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:
CPP
// C++ program to calculate Percentile of Students #include <bits/stdc++.h> using namespace std; // Function to calculate the percentile void 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 Code int main() { int StudentMarks[] = { 12, 60, 80, 71, 30 }; int n = sizeof(StudentMarks) / sizeof(StudentMarks[0]); percentile(StudentMarks, n); return 0; } |
Java
// Java program to calculate Percentile of Students 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); 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 |
Python
# Python3 program to calculate Percentile of Students # Function to calculate the percentile def 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#
// C# program to calculate Percentile of Students using 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 |
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
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