Code Line
stringclasses 57
values | User Explanation
stringclasses 692
values | Line-Explanation in PCEX
stringclasses 131
values | Annotation Score
float64 1
5
⌀ |
|---|---|---|---|
for (int num = 2; num <= 10; num += 2) {
|
Since num must be <= 10 to execute what code is in the body of the function, the code in the body will execute for num = 10 as well.
|
To do this, we initialize variable num to 2, loop until reaching 10 (inclusive), and increment num by 2 after each iteration of the loop.
| 2 |
for (int num = 2; num <= 10; num += 2) {
|
Since num must be <= 10 to execute what code is in the body of the function, the code in the body will execute for num = 10 as well.
|
We use for loops instead of a while loop because we need to repeat the loop a certain number of times, and for loops are best-suited in cases like this when we know ahead of time the number of times that we need to repeat the loop.
| 1 |
for (int num = 2; num <= 10; num += 2) {
|
Since num must be <= 10 to execute what code is in the body of the function, the code in the body will execute for num = 10 as well.
|
Here, we want the for loop to start counting from 2 (2 is the first positive even number) with every even integer number up to (including) 10.
| 3 |
int minutes = seconds / 60;
|
Create the variable minutes
|
To obtain the minutes in seconds, we divide the seconds by 60 because there are 60 seconds in a minute.
| 2 |
int minutes = seconds / 60;
|
Create the variable minutes
|
Note that since both operands of division operator are integer, the fractional part of the result is truncated, if there is any.
| 1 |
int remainingSeconds = seconds % 60;
|
Stores the missing seconds
|
This is because there are 60 seconds in a minute.
| 1 |
int remainingSeconds = seconds % 60;
|
Stores the missing seconds
|
Note that the % operator returns the remainder of the division.
| 1 |
int remainingSeconds = seconds % 60;
|
Stores the missing seconds
|
To obtain the remaining seconds after taking away the minutes, we have to take the remainder of the seconds divided by 60.
| 1 |
System.out.println(seconds + " seconds is " + minutes + " minutes and " + remainingSeconds + " seconds.");
|
Output
|
This statement prints to the default standard output stream the minutes and remaining seconds from the input amount of time in seconds.
| 2 |
System.out.println(seconds + " seconds is " + minutes + " minutes and " + remainingSeconds + " seconds.");
|
Output
|
The printed text is followed by the end-of-line character at the end.
| 1 |
int num = 15;
|
Creates the variable num
|
We define variable num to store the number that we want to find its smallest divisor.
| 3 |
int num = 15;
|
Creates the variable num
|
We could initialize it to any positive integer greater than 1.
| 1 |
int num = 15;
|
Creates the variable num
|
In this program, we initialize variable num to 15.
| 2 |
System.out.println(num + " squared = " + (num * num));
|
This code will print what the current num is and its squared value.
|
The multiplication may also be performed directly in the println statement.
| 1 |
System.out.println(num + " squared = " + (num * num));
|
This code will print what the current num is and its squared value.
|
Note that we do not necessarily have to store the squared number in a variable.
| 1 |
System.out.println(num + " squared = " + (num * num));
|
This code will print what the current num is and its squared value.
|
To square each number in the sequence, we multiply it by itself using the multiplication (*) operator.
| 2 |
System.out.println(num + " squared = " + (num * num));
|
This code will print what the current num is and its squared value.
|
In each iteration of the loop, this statement prints the square number to the default standard output stream.
| 3 |
System.out.println(num + " squared = " + (num * num));
|
For instance, if num is 4 it will print "4 squared = 16".
|
The multiplication may also be performed directly in the println statement.
| 1 |
System.out.println(num + " squared = " + (num * num));
|
For instance, if num is 4 it will print "4 squared = 16".
|
Note that we do not necessarily have to store the squared number in a variable.
| 1 |
System.out.println(num + " squared = " + (num * num));
|
For instance, if num is 4 it will print "4 squared = 16".
|
To square each number in the sequence, we multiply it by itself using the multiplication (*) operator.
| 1 |
System.out.println(num + " squared = " + (num * num));
|
For instance, if num is 4 it will print "4 squared = 16".
|
In each iteration of the loop, this statement prints the square number to the default standard output stream.
| 2 |
int divisor = 2;
|
Creates the variable divisor
|
We initialize variable divisor by 2 because we want to find the smallest divisor except 1.
| 2 |
int divisor = 2;
|
Creates the variable divisor
|
We define variable divisor to store the smallest divisor of the number.
| 3 |
while (num % divisor != 0) {
|
Loop start
|
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) {
|
Loop start
|
We need to increment the divisor repeatedly as long as the divisor is not a factor of the number.
| 1 |
while (num % divisor != 0) {
|
Loop start
|
Therefore, we need to use a loop structure.
| 2 |
while (num % divisor != 0) {
|
Loop start
|
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.
| 1 |
while (num % divisor != 0) {
|
Loop start
|
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.
| 1 |
divisor += 1;
|
Find the new divisor
|
When the divisor is not a factor of the number, we increment the variable divisor by 1.
| 2 |
scan.close();
|
Closes the entrance
|
We close the scanner as we do not want to process any input from the user in the rest of the program.
| 2 |
System.out.println("The smallest divisor of " + num + " is " + divisor);
|
Output
|
This statement prints to the default standard output stream the smallest divisor of the number.
| 2 |
Point1 point = new Point1();
|
This line instantiates a brand new Point1 object.
|
This statement creates a Point1 object using the new keyword and empty parentheses.
| 3 |
Point1 point = new Point1();
|
This line instantiates a brand new Point1 object.
|
The variable point holds a reference to a Point1 object.
| 2 |
Scanner scan = new Scanner(System.in);
|
Set input start
|
To read the input value from the user, we need to define a Scanner object.
| 2 |
Scanner scan = new Scanner(System.in);
|
Set input start
|
We need to read and process the integer that the user enters.
| 2 |
System.out.println("Enter an integer: ");
|
Prints the phrase "Enter an integer:"
|
We prompt the user to enter an integer.
| 4 |
int num = scan.nextInt();
|
Creates the variable "num"
|
We read the input integer by calling the nextInt() method because this input is an integer.
| 1 |
int num = scan.nextInt();
|
Creates the variable "num"
|
We need to read the integer that the user enters and store it in a variable.
| 2 |
point.setX(7);
|
This sets the x variable defined by the Point1 object to 7.
|
This statement invokes the method setX of the point to set its x-coordinate to 7.
| 4 |
scan.close();
|
Close input
|
We close the scanner as we do not want to process any input from the user in the rest of the program.
| 2 |
if ( num > 0 ) {
|
Finds "num" greater than zero
|
If the integer is neither positive nor negative, then we could conclude that the integer is zero.
| 1 |
if ( num > 0 ) {
|
Finds "num" greater than zero
|
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 ) {
|
Finds "num" greater than zero
|
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.
| 1 |
if ( num > 0 ) {
|
Finds "num" greater than zero
|
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 ) {
|
Finds "num" greater than zero
|
If both of these tests fail, then we could conclude that the integer is zero.
| 1 |
System.out.println("The integer is positivie.");
|
Prints if the number is positive
|
This statement prints that the integer is positive.
| 4 |
System.out.println("The integer is positivie.");
|
Prints if the number is positive
|
The printed text is followed by the end-of-line character at the end.
| 1 |
} else if ( num < 0 ) {
|
Finds "num" less than zero
|
If the first test fails (i.e., when the integer is not positive), we need to test if the integer is negative.
| 2 |
point.translate(11, 6);
|
This increments the x variable from the Point1 object by 11 and also increments the y variable by 6.
|
This statement invokes the method translate of the point.
| 2 |
point.translate(11, 6);
|
This increments the x variable from the Point1 object by 11 and also increments the y variable by 6.
|
The second parameter specifies how much we want to shift the y-coordinate of the point.
| 2 |
point.translate(11, 6);
|
This increments the x variable from the Point1 object by 11 and also increments the y variable by 6.
|
The translate method receives two parameters.
| 1 |
point.translate(11, 6);
|
This increments the x variable from the Point1 object by 11 and also increments the y variable by 6.
|
The first parameter specifies how much we want to shift the x-coordinate of the point.
| 2 |
System.out.println("The integer is negative.");
|
Output if the number is negative
|
The printed text is followed by the end-of-line character at the end.
| 1 |
System.out.println("The integer is negative.");
|
Output if the number is negative
|
This statement prints that the integer is negative.
| 5 |
Scanner scan = new Scanner(System.in);
|
introduce a new input scanner named "scan"
|
To read the input value from the user, we need to define a Scanner object.
| 4 |
Scanner scan = new Scanner(System.in);
|
introduce a new input scanner named "scan"
|
We need to read and process the value that the user enters.
| 2 |
} else {
|
If it is not negative or positive
|
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.
| 3 |
System.out.println("The integer is zero.");
|
Prints that the number is equal to 0
|
The printed text is followed by the end-of-line character at the end.
| 1 |
System.out.println("The integer is zero.");
|
Prints that the number is equal to 0
|
This statement prints that the integer is zero.
| 5 |
System.out.println("Enter an integer for seconds: ");
|
Ask the user to input an integer for seconds
|
We prompt the user to enter the seconds.
| 5 |
int [] arr = { 1, 2, 3};
|
Creates the variable "arr"
|
We initialize the array of type int to hold the specified numbers.
| 1 |
int [] arr = { 1, 2, 3};
|
Creates the variable "arr"
|
We initialize the array by separating elements with a comma and enclosing the collection in braces { }.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
|
This prints out the current point1 object's x and y variables by using .getX and .getY functions that return the data stored in those variables.
|
Note that we do not necessarily have to store the returned value from each of these methods in a variable.
| 2 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
|
This prints out the current point1 object's x and y variables by using .getX and .getY functions that return the data stored in those variables.
|
We could use the returned value of them directly in the println statement.
| 2 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
|
This prints out the current point1 object's x and y variables by using .getX and .getY functions that return the data stored in those variables.
|
This statement prints the coordinates of the point to the default standard output stream.
| 4 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
|
This prints out the current point1 object's x and y variables by using .getX and .getY functions that return the data stored in those variables.
|
The printed text is followed by the end-of-line character at the end.
| 2 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
|
This prints out the current point1 object's x and y variables by using .getX and .getY functions that return the data stored in those variables.
|
To get the point's coordinates, we invoke the method getX and getY of the point.
| 4 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
|
This prints out the current point1 object's x and y variables by using .getX and .getY functions that return the data stored in those variables.
|
Note that we do not necessarily have to store the returned value from each of these methods in a variable.
| 1 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
|
This prints out the current point1 object's x and y variables by using .getX and .getY functions that return the data stored in those variables.
|
We could use the returned value of them directly in the println statement.
| 2 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
|
This prints out the current point1 object's x and y variables by using .getX and .getY functions that return the data stored in those variables.
|
This statement prints the coordinates of the point to the default standard output stream.
| 4 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
|
This prints out the current point1 object's x and y variables by using .getX and .getY functions that return the data stored in those variables.
|
The printed text is followed by the end-of-line character at the end.
| 2 |
System.out.println("The point's coordinates: (" + point.getX() + ", " + point.getY() + ")") ;
|
This prints out the current point1 object's x and y variables by using .getX and .getY functions that return the data stored in those variables.
|
To get the point's coordinates, we invoke the method getX and getY of the point.
| 4 |
int seconds = scan.nextInt();
|
set user input to int named "seconds"
|
We need to read the seconds that the user enters and store it in a variable.
| 4 |
int seconds = scan.nextInt();
|
set user input to int named "seconds"
|
We read the seconds by calling the nextInt() method because this input is an integer.
| 2 |
arr[i] += 1;
|
New value of "arr"
|
This statement increments the element at the index i of the array by 1.
| 1 |
for ( int i = 0; i < arr.length; i++ ) {
|
Loop start
|
We want to iterate over the array and increment each element in the array by 1.
| 2 |
for ( int i = 0; i < arr.length; i++ ) {
|
Loop start
|
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.
| 1 |
for ( int i = 0; i < arr.length; i++ ) {
|
Loop start
|
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.
| 1 |
scan.close();
|
stop the scan input function
|
We close the scanner as we do not want to process any input from the user in the rest of the program.
| 2 |
int minutes = seconds / 60;
|
define integer "minutes" as "seconds" divided by 60
|
To obtain the minutes in seconds, we divide the seconds by 60 because there are 60 seconds in a minute.
| 4 |
int minutes = seconds / 60;
|
define integer "minutes" as "seconds" divided by 60
|
Note that since both operands of division operator are integer, the fractional part of the result is truncated, if there is any.
| 1 |
for (int num = 2; num <= 10; num += 2) {
|
Num will be set to two and incremented by 2 (guaranteeing even values) after the for loop executes the body in the code each time, until num reaches 10.
|
To do this, we need to use a loop structure.
| 2 |
for (int num = 2; num <= 10; num += 2) {
|
Num will be set to two and incremented by 2 (guaranteeing even values) after the for loop executes the body in the code each time, until num reaches 10.
|
We need to repeat the same process for each of the even positive integers that are less than or equal to 10.
| 4 |
for (int num = 2; num <= 10; num += 2) {
|
Num will be set to two and incremented by 2 (guaranteeing even values) after the for loop executes the body in the code each time, until num reaches 10.
|
To do this, we initialize variable num to 2, loop until reaching 10 (inclusive), and increment num by 2 after each iteration of the loop.
| 4 |
for (int num = 2; num <= 10; num += 2) {
|
Num will be set to two and incremented by 2 (guaranteeing even values) after the for loop executes the body in the code each time, until num reaches 10.
|
We use for loops instead of a while loop because we need to repeat the loop a certain number of times, and for loops are best-suited in cases like this when we know ahead of time the number of times that we need to repeat the loop.
| 2 |
for (int num = 2; num <= 10; num += 2) {
|
Num will be set to two and incremented by 2 (guaranteeing even values) after the for loop executes the body in the code each time, until num reaches 10.
|
Here, we want the for loop to start counting from 2 (2 is the first positive even number) with every even integer number up to (including) 10.
| 3 |
int remainingSeconds = seconds % 60;
|
define the remainder of seconds/60 as "remainingSeconds" integer
|
This is because there are 60 seconds in a minute.
| 1 |
int remainingSeconds = seconds % 60;
|
define the remainder of seconds/60 as "remainingSeconds" integer
|
Note that the % operator returns the remainder of the division.
| 2 |
int remainingSeconds = seconds % 60;
|
define the remainder of seconds/60 as "remainingSeconds" integer
|
To obtain the remaining seconds after taking away the minutes, we have to take the remainder of the seconds divided by 60.
| 3 |
System.out.println(num + " squared = " + (num * num));
|
This line prints the current value of num and its squared value, for instance if num = 4, it will print "4.squared = 16"
|
The multiplication may also be performed directly in the println statement.
| 1 |
System.out.println(num + " squared = " + (num * num));
|
This line prints the current value of num and its squared value, for instance if num = 4, it will print "4.squared = 16"
|
Note that we do not necessarily have to store the squared number in a variable.
| 1 |
System.out.println(num + " squared = " + (num * num));
|
This line prints the current value of num and its squared value, for instance if num = 4, it will print "4.squared = 16"
|
To square each number in the sequence, we multiply it by itself using the multiplication (*) operator.
| 3 |
System.out.println(num + " squared = " + (num * num));
|
This line prints the current value of num and its squared value, for instance if num = 4, it will print "4.squared = 16"
|
In each iteration of the loop, this statement prints the square number to the default standard output stream.
| 4 |
System.out.println(num + " squared = " + (num * num));
|
This line prints the current value of num and its squared value, for instance if num = 4, it will print "4.squared = 16"
|
The multiplication may also be performed directly in the println statement.
| 1 |
System.out.println(num + " squared = " + (num * num));
|
This line prints the current value of num and its squared value, for instance if num = 4, it will print "4.squared = 16"
|
Note that we do not necessarily have to store the squared number in a variable.
| 1 |
System.out.println(num + " squared = " + (num * num));
|
This line prints the current value of num and its squared value, for instance if num = 4, it will print "4.squared = 16"
|
To square each number in the sequence, we multiply it by itself using the multiplication (*) operator.
| 3 |
System.out.println(num + " squared = " + (num * num));
|
This line prints the current value of num and its squared value, for instance if num = 4, it will print "4.squared = 16"
|
In each iteration of the loop, this statement prints the square number to the default standard output stream.
| 3 |
System.out.println(seconds + " seconds is " + minutes + " minutes and " + remainingSeconds + " seconds.");
|
output the integers to the user
|
This statement prints to the default standard output stream the minutes and remaining seconds from the input amount of time in seconds.
| 3 |
System.out.println(seconds + " seconds is " + minutes + " minutes and " + remainingSeconds + " seconds.");
|
output the integers to the user
|
The printed text is followed by the end-of-line character at the end.
| 1 |
Point1 point = new Point1();
|
This line instantiates a new Point1 object named point.
|
This statement creates a Point1 object using the new keyword and empty parentheses.
| 4 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.