Program to calculate Percentile of Students

21 Apr, 2021
Given an array containing marks of students, the task is to calculate the percentile of the students. The percentile is calculated according to the following rule:  
The percentile of a student is the % of the number of students having marks less than him/her.
Examples:  
Input: arr[] = { 12, 60, 80, 71, 30 }Output: { 0, 50, 100, 75, 25 }Explanation: Percentile of Student 1 = 0/4*100 = 0 (out of other 4 students no one has marks less than this student) Percentile of Student 2 = 2/4*100 = 50 (out of other 4 students, 2 have marks less than this student) Percentile of Student 3 = 4/4*100 = 100 (out of other 4 students, all 4 have marks less than this student) Percentile of Student 4 = 3/4*100 = 75 (out of other 4 students, 3 have marks less than this student) Percentile of Student 5 = 1/4*100 = 25 (out of other 4 students only 1 has marks less than this student)  
 
Approach:  
So basically, the percentile is a number where a certain percentage of scores fall below that number.  
For example: If in an examination a student’s percentile is 75 then it means that the student has scored more than 75% of students who took the test.  
Now, in order to calculate percentile we have the following formula:PERCENTILE = (NUMBER OF STUDENTS WHO SCORED BELOW OR EQUAL TO THE DESIRED STUDENT/ TOTAL NUMBER OF STUDENTS – 1) * 100  
Below is the implementation of the above approach: 
C++
Java
Python
C#
Javascript
// C++ program to calculate Percentile of Students #include <bits/stdc++.h>using namespace std; // Function to calculate the percentilevoid percentile(int arr[], int n){    int i, j, count, percent;     // Start of the loop that calculates percentile    for (i = 0; i < n; i++) {         count = 0;        for (int j = 0; j < n; j++) {             // Comparing the marks of student i            // with all other students            if (arr[i] > arr[j]) {                count++;            }        }        percent = (count * 100) / (n - 1);         cout << "\nPercentile of Student "             << i + 1 << " = " << percent;    }} // Driver Codeint main(){    int StudentMarks[] = { 12, 60, 80, 71, 30 };    int n = sizeof(StudentMarks) / sizeof(StudentMarks[0]);    percentile(StudentMarks, n);     return 0;}
// Java program to calculate Percentile of Studentsclass GFG{     // Function to calculate the percentile    static void percentile(int arr[], int n)    {        int i, count, percent;         // Start of the loop that calculates percentile        for (i = 0; i < n; i++)        {             count = 0;            for (int j = 0; j < n; j++)            {                 // Comparing the marks of student i                // with all other students                if (arr[i] > arr[j])                {                    count++;                }            }            percent = (count * 100) / (n - 1);             System.out.print("\nPercentile of Student "            + (i + 1) + " = " + percent);        }    }     // Driver Code    public static void main(String[] args)    {        int[] StudentMarks = { 12, 60, 80, 71, 30 };        int n = StudentMarks.length;        percentile(StudentMarks, n);    }} // This code is contributed by Rajput-Ji
# Python3 program to calculate Percentile of Students # Function to calculate the percentiledef percentile(arr, n):    i, j = 0, 0    count, percent = 0, 0     # Start of the loop that calculates percentile    while i < n:         count = 0        j = 0        while j < n:             # Comparing the marks of student i            # with all other students            if (arr[i] > arr[j]):                count += 1            j += 1        percent = (count * 100) // (n - 1)         print("Percentile of Student ", i + 1," = ", percent)        i += 1 # Driver Code StudentMarks = [12, 60, 80, 71, 30]n = len(StudentMarks)percentile(StudentMarks, n) # This code is contributed by mohit kumar 29
// C# program to calculate Percentile of Studentsusing System; class GFG{     // Function to calculate the percentile    static void percentile(int []arr, int n)    {        int i, count, percent;         // Start of the loop that calculates percentile        for (i = 0; i < n; i++)        {            count = 0;            for (int j = 0; j < n; j++)            {                 // Comparing the marks of student i                // with all other students                if (arr[i] > arr[j])                {                    count++;                }            }            percent = (count * 100) / (n - 1);             Console.Write("\nPercentile of Student "            + (i + 1) + " = " + percent);        }    }     // Driver Code    public static void Main()    {        int[] StudentMarks = {12, 60, 80, 71, 30};        int n = StudentMarks.Length;        percentile(StudentMarks, n);    }} // This code is contributed by AnkitRai01
<script> // Javascript program to calculate// Percentile of Students // Function to calculate the percentilefunction percentile(arr, n){    var i, count, percent;     // Start of the loop that calculates percentile    for (i = 0; i < n; i++)    {         count = 0;        for (var j = 0; j < n; j++)        {             // Comparing the marks of student i            // with all other students            if (arr[i] > arr[j])            {                count++;            }        }        percent = (count * 100) / (n - 1);         document.write("\nPercentile of Student "        + (i + 1) + " = " + percent + "<br>");    }}     // Driver Codevar StudentMarks = [ 12, 60, 80, 71, 30 ];var n = StudentMarks.length; percentile(StudentMarks, n); // This code is contributed by Khushboogoyal499 </script>
Percentile of Student 1 = 0
Percentile of Student 2 = 50
Percentile of Student 3 = 100
Percentile of Student 4 = 75
Percentile of Student 5 = 25
 
mohit kumar 29
Rajput-Ji
ankthon
khushboogoyal499
Arrays
School Programming
Arrays
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