Code Line
stringclasses 57
values | User Explanation
stringclasses 692
values | Line-Explanation in PCEX
stringclasses 131
values | Annotation Score
float64 1
5
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if ( num > 0 ) {
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It can be used to check if the value is positive.
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If both of these tests fail, then we could conclude that the integer is zero.
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if ( num > 0 ) {
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This checks whether the value given by the user was greater than 0.
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If the integer is neither positive nor negative, then we could conclude that the integer is zero.
| 2 |
if ( num > 0 ) {
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This checks whether the value given by the user was greater than 0.
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The conditions that tests for the integer's sign are mutually exclusive (i.e., one and only one of the conditions can be true); therefore, their order does not matter.
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if ( num > 0 ) {
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This checks whether the value given by the user was greater than 0.
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To determine the sign of the integer, we need to perform two tests: one for determining whether the integer is positive and one for determining whether the integer is negative.
| 2 |
if ( num > 0 ) {
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This checks whether the value given by the user was greater than 0.
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Also, it is better to use if-else if statements instead of sequential if statements because an integer has only one sign and once we find the sign, we don't need to perform more tests.
| 1 |
if ( num > 0 ) {
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This checks whether the value given by the user was greater than 0.
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If both of these tests fail, then we could conclude that the integer is zero.
| 2 |
if ( num > 0 ) {
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It can be used to check if the value is positive.
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If the integer is neither positive nor negative, then we could conclude that the integer is zero.
| 2 |
if ( num > 0 ) {
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It can be used to check if the value is positive.
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The conditions that tests for the integer's sign are mutually exclusive (i.e., one and only one of the conditions can be true); therefore, their order does not matter.
| 1 |
if ( num > 0 ) {
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It can be used to check if the value is positive.
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To determine the sign of the integer, we need to perform two tests: one for determining whether the integer is positive and one for determining whether the integer is negative.
| 2 |
if ( num > 0 ) {
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It can be used to check if the value is positive.
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Also, it is better to use if-else if statements instead of sequential if statements because an integer has only one sign and once we find the sign, we don't need to perform more tests.
| 1 |
if ( num > 0 ) {
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It can be used to check if the value is positive.
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If both of these tests fail, then we could conclude that the integer is zero.
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System.out.println("The integer is positivie.");
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This prints out "The integer is positive" so that the user knows that their value is positive.
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This statement prints that the integer is positive.
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System.out.println("The integer is positivie.");
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This prints out "The integer is positive" so that the user knows that their value is positive.
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The printed text is followed by the end-of-line character at the end.
| 1 |
} else if ( num < 0 ) {
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This checks if num is negative only when num fails to be positive.
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If the first test fails (i.e., when the integer is not positive), we need to test if the integer is negative.
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System.out.println("The integer is negative.");
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This prints that "the integer is negative" so that the user knows that the value is negative.
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The printed text is followed by the end-of-line character at the end.
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System.out.println("The integer is negative.");
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This prints that "the integer is negative" so that the user knows that the value is negative.
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This statement prints that the integer is negative.
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} else {
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This allows for the codes within the else brackets to execute only if the num is not neg or positive.
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We need to end the above if-else if statements with an else statement that its body is executed when none of the above tests are true, that is when the integer is zero.
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System.out.println("The integer is zero.");
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This prints that the integer was zero so that the user knows that their value was 0.
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The printed text is followed by the end-of-line character at the end.
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System.out.println("The integer is zero.");
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This prints that the integer was zero so that the user knows that their value was 0.
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This statement prints that the integer is zero.
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int [] arr = { 1, 2, 3};
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This stores the array [1,2,3] in a variable called arr so that the elements in arr can later be incremented.
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We initialize the array of type int to hold the specified numbers.
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int [] arr = { 1, 2, 3};
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This stores the array [1,2,3] in a variable called arr so that the elements in arr can later be incremented.
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We initialize the array by separating elements with a comma and enclosing the collection in braces { }.
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for ( int i = 0; i < arr.length; i++ ) {
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This loop will iterate through all elements in the array so that all values can be incremented.
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We want to iterate over the array and increment each element in the array by 1.
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for ( int i = 0; i < arr.length; i++ ) {
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This loop will iterate through all elements in the array so that all values can be incremented.
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To really change the array as we march across it, we need to use indexes so we can assign an updated value to each position as we go.
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for ( int i = 0; i < arr.length; i++ ) {
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This loop will iterate through all elements in the array so that all values can be incremented.
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We need the array indexes to start at 0 (array indexes start from 0) with every integer number up to but not including the array length.
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arr[i] += 1;
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This grabs the value stored in index i of the array and increments it by 1 and adds it back to the array.
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This statement increments the element at the index i of the array by 1.
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Scanner scan = new Scanner(System.in);
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This initiates a new scanner object with a variable name of scan.
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To read the input value from the user, we need to define a Scanner object.
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Scanner scan = new Scanner(System.in);
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This initiates a new scanner object with a variable name of scan.
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We need to read and process the value that the user enters.
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Scanner scan = new Scanner(System.in);
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scan can be used to get input from the user.
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To read the input value from the user, we need to define a Scanner object.
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Scanner scan = new Scanner(System.in);
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scan can be used to get input from the user.
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We need to read and process the value that the user enters.
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Scanner scan = new Scanner(System.in);
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This initiates a new scanner object with a variable name of scan.
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To read the input value from the user, we need to define a Scanner object.
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Scanner scan = new Scanner(System.in);
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This initiates a new scanner object with a variable name of scan.
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We need to read and process the value that the user enters.
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Scanner scan = new Scanner(System.in);
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scan can be used to get input from the user.
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To read the input value from the user, we need to define a Scanner object.
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Scanner scan = new Scanner(System.in);
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scan can be used to get input from the user.
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We need to read and process the value that the user enters.
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System.out.println("Enter an integer for seconds: ");
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This prints out "Enter an integer for seconds:" so that the user knows what to enter.
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We prompt the user to enter the seconds.
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int seconds = scan.nextInt();
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This gets user input and saves it in an int variable called seconds.
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We need to read the seconds that the user enters and store it in a variable.
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int seconds = scan.nextInt();
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This gets user input and saves it in an int variable called seconds.
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We read the seconds by calling the nextInt() method because this input is an integer.
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scan.close();
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This closes scan since it will not be used anymore.
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We close the scanner as we do not want to process any input from the user in the rest of the program.
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int minutes = seconds / 60;
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This divides the integer value that the user entered by 60 and saves it in a variable called minutes.
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To obtain the minutes in seconds, we divide the seconds by 60 because there are 60 seconds in a minute.
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int minutes = seconds / 60;
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This divides the integer value that the user entered by 60 and saves it in a variable called minutes.
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Note that since both operands of division operator are integer, the fractional part of the result is truncated, if there is any.
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int remainingSeconds = seconds % 60;
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This takes the modulus of user input and 60 and saves it into an int variable named remaining Seconds.
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This is because there are 60 seconds in a minute.
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int remainingSeconds = seconds % 60;
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This takes the modulus of user input and 60 and saves it into an int variable named remaining Seconds.
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Note that the % operator returns the remainder of the division.
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int remainingSeconds = seconds % 60;
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This takes the modulus of user input and 60 and saves it into an int variable named remaining Seconds.
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To obtain the remaining seconds after taking away the minutes, we have to take the remainder of the seconds divided by 60.
| 2 |
System.out.println(seconds + " seconds is " + minutes + " minutes and " + remainingSeconds + " seconds.");
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This prints out the previously define minutes and remainingSeconds data.
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This statement prints to the default standard output stream the minutes and remaining seconds from the input amount of time in seconds.
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System.out.println(seconds + " seconds is " + minutes + " minutes and " + remainingSeconds + " seconds.");
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This prints out the previously define minutes and remainingSeconds data.
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The printed text is followed by the end-of-line character at the end.
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int num = 15;
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This saves the integer 15 to a variable called num.
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We define variable num to store the number that we want to find its smallest divisor.
| 1 |
int num = 15;
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This saves the integer 15 to a variable called num.
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We could initialize it to any positive integer greater than 1.
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int num = 15;
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This saves the integer 15 to a variable called num.
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In this program, we initialize variable num to 15.
| 2 |
int divisor = 2;
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This saves the integer 2 into a variable called divisor.
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We initialize variable divisor by 2 because we want to find the smallest divisor except 1.
| 3 |
int divisor = 2;
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This saves the integer 2 into a variable called divisor.
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We define variable divisor to store the smallest divisor of the number.
| 2 |
while (num % divisor != 0) {
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While divisor is not a divisor of num, the body in the while function will execute.
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Since we don't know ahead of time how many times the loop will be repeated, we need to use a while loop.
| 2 |
while (num % divisor != 0) {
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While divisor is not a divisor of num, the body in the while function will execute.
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We need to increment the divisor repeatedly as long as the divisor is not a factor of the number.
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while (num % divisor != 0) {
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While divisor is not a divisor of num, the body in the while function will execute.
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Therefore, we need to use a loop structure.
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while (num % divisor != 0) {
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While divisor is not a divisor of num, the body in the while function will execute.
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The condition in the while loop tests whether the body of the loop should be repeated, so it should test whether the divisor is not a factor of the number.
| 2 |
while (num % divisor != 0) {
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While divisor is not a divisor of num, the body in the while function will execute.
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We could check whether the divisor is not a factor of the number by computing the remainder of the division of the number by the divisor.
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divisor += 1;
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This increments divisor by one, so that in the next round, the while loop will check whether the data in divisor is a divisor of num.
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When the divisor is not a factor of the number, we increment the variable divisor by 1.
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int divisor = 2;
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This saves the integer 2 into a variable called divisor.
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We initialize variable divisor by 2 because we want to find the smallest divisor except 1.
| 3 |
int divisor = 2;
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This saves the integer 2 into a variable called divisor.
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We define variable divisor to store the smallest divisor of the number.
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int divisor = 2;
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This is the smallest possible divisor (greater than 1) of any number.
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We initialize variable divisor by 2 because we want to find the smallest divisor except 1.
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int divisor = 2;
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This is the smallest possible divisor (greater than 1) of any number.
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We define variable divisor to store the smallest divisor of the number.
| 2 |
int divisor = 2;
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This saves the integer 2 into a variable called divisor.
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We initialize variable divisor by 2 because we want to find the smallest divisor except 1.
| 3 |
int divisor = 2;
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This saves the integer 2 into a variable called divisor.
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We define variable divisor to store the smallest divisor of the number.
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int divisor = 2;
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This is the smallest possible divisor (greater than 1) of any number.
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We initialize variable divisor by 2 because we want to find the smallest divisor except 1.
| 2 |
int divisor = 2;
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This is the smallest possible divisor (greater than 1) of any number.
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We define variable divisor to store the smallest divisor of the number.
| 2 |
int divisor = 2;
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This saves the integer 2 into a variable called divisor.
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We initialize variable divisor by 2 because we want to find the smallest divisor except 1.
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int divisor = 2;
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This saves the integer 2 into a variable called divisor.
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We define variable divisor to store the smallest divisor of the number.
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int divisor = 2;
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This is the smallest possible divisor (greater than 1) of any number.
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We initialize variable divisor by 2 because we want to find the smallest divisor except 1.
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int divisor = 2;
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This is the smallest possible divisor (greater than 1) of any number.
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We define variable divisor to store the smallest divisor of the number.
| 2 |
System.out.println("The smallest divisor of " + num + " is " + divisor);
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This prints out what the smallest divisor of the number is.
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This statement prints to the default standard output stream the smallest divisor of the number.
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int num = 1234;
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We need to initialize an integer variable which will hold an arbitrary integer value, so that we can perform the necessary operation of extracting its digits from right to left.
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We need variable num to store the integer that we want to print its digits.
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int num = 1234;
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We need to initialize an integer variable which will hold an arbitrary integer value, so that we can perform the necessary operation of extracting its digits from right to left.
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We need variable num to store the integer that we want to print its digits.
| 3 |
int num = 1234;
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We need to initialize an integer variable which will hold an arbitrary integer value, so that we can perform the necessary operation of extracting its digits from right to left.
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We need variable num to store the integer that we want to print its digits.
| 3 |
int num = 1234;
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We need to initialize an integer variable which will hold an arbitrary integer value, so that we can perform the necessary operation of extracting its digits from right to left.
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We need variable num to store the integer that we want to print its digits.
| 3 |
int num = 1234;
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We need to initialize an integer variable which will hold an arbitrary integer value, so that we can perform the necessary operation of extracting its digits from right to left.
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We need variable num to store the integer that we want to print its digits.
| 3 |
int num = 1234;
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We need to initialize an integer variable which will hold an arbitrary integer value, so that we can perform the necessary operation of extracting its digits from right to left.
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We need variable num to store the integer that we want to print its digits.
| 3 |
int num = 1234;
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We need to initialize an integer variable which will hold an arbitrary integer value, so that we can perform the necessary operation of extracting its digits from right to left.
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We need variable num to store the integer that we want to print its digits.
| 3 |
int num = 1234;
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We need to initialize an integer variable which will hold an arbitrary integer value, so that we can perform the necessary operation of extracting its digits from right to left.
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We need variable num to store the integer that we want to print its digits.
| 3 |
do {
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It's the beginning of a do while loop, we need the program to loop through the length of the number, so as to extract the digits.
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We need to process the digits of the integer from right to left and print them.
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do {
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It's the beginning of a do while loop, we need the program to loop through the length of the number, so as to extract the digits.
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Therefore, we need to use a loop structure.
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do {
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It's the beginning of a do while loop, we need the program to loop through the length of the number, so as to extract the digits.
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In this program, we do this by using a do loop.
| 2 |
do {
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It's the beginning of a do while loop, we need the program to loop through the length of the number, so as to extract the digits.
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The do loop is more appropriate than a while loop because a positive integer always has at least one digit which results in the body of the loop performing at least once.
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System.out.println(num % 10);
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This line of code , prints the last digit, that is the right most digit of the number.
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Each printed digit is followed by the line separator (e.g. '\n') at the end.
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System.out.println(num % 10);
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This line of code , prints the last digit, that is the right most digit of the number.
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We need to extract the last digit in the 1's position of the integer.
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System.out.println(num % 10);
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This line of code , prints the last digit, that is the right most digit of the number.
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For example, if the integer is 1234, we want to extract the digit 4 that is in 1's position of the integer.
| 2 |
System.out.println(num % 10);
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This line of code , prints the last digit, that is the right most digit of the number.
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We do this by calculating the remainder of the division of the integer by 10.
| 1 |
System.out.println(num % 10);
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This line of code , prints the last digit, that is the right most digit of the number.
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Then, this statement prints the last digit of the integer to the standard output stream.
| 4 |
System.out.println(num % 10);
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This works by taking its reminder when divided by 10, using the %(modulo) operator.
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Each printed digit is followed by the line separator (e.g. '\n') at the end.
| 1 |
System.out.println(num % 10);
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This works by taking its reminder when divided by 10, using the %(modulo) operator.
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We need to extract the last digit in the 1's position of the integer.
| 2 |
System.out.println(num % 10);
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This works by taking its reminder when divided by 10, using the %(modulo) operator.
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For example, if the integer is 1234, we want to extract the digit 4 that is in 1's position of the integer.
| 1 |
System.out.println(num % 10);
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This works by taking its reminder when divided by 10, using the %(modulo) operator.
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We do this by calculating the remainder of the division of the integer by 10.
| 4 |
System.out.println(num % 10);
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This works by taking its reminder when divided by 10, using the %(modulo) operator.
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Then, this statement prints the last digit of the integer to the standard output stream.
| 1 |
int num = 1234;
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This saves the integer, whose digits will be printed from left to right, in a variable called num.
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We need variable num to store the integer that we want to print its digits.
| 2 |
num = num / 10;
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After extracting the right most digit, we need to get rid of it from the number.
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Therefore, this division will remove the digit that we processed (lastDigit) and we can move on to the next digit.
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num = num / 10;
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After extracting the right most digit, we need to get rid of it from the number.
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We truncate the extracted digit that we processed from the original integer by dividing the integer by 10.
| 2 |
num = num / 10;
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After extracting the right most digit, we need to get rid of it from the number.
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Note that this statement performs an integer division because both operand of the / operator are integer.
| 1 |
num = num / 10;
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To do that, we simply divide the integer number by 10, and the end result is a the same number without the right most digit.
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Therefore, this division will remove the digit that we processed (lastDigit) and we can move on to the next digit.
| 2 |
num = num / 10;
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To do that, we simply divide the integer number by 10, and the end result is a the same number without the right most digit.
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We truncate the extracted digit that we processed from the original integer by dividing the integer by 10.
| 2 |
num = num / 10;
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To do that, we simply divide the integer number by 10, and the end result is a the same number without the right most digit.
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Note that this statement performs an integer division because both operand of the / operator are integer.
| 1 |
num = num / 10;
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After that we replace the previous num value with this value (the one with the right most digit removed).
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Therefore, this division will remove the digit that we processed (lastDigit) and we can move on to the next digit.
| 3 |
num = num / 10;
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After that we replace the previous num value with this value (the one with the right most digit removed).
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We truncate the extracted digit that we processed from the original integer by dividing the integer by 10.
| 2 |
num = num / 10;
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After that we replace the previous num value with this value (the one with the right most digit removed).
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Note that this statement performs an integer division because both operand of the / operator are integer.
| 1 |
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