# Calculate the CGPA and CGPA % of marks obtained by a Student in N subjects

• Difficulty Level : Easy
• Last Updated : 10 Nov, 2021

Given an array arr[] of size N which contains the marks of a student in N subjects, the task is to calculate the CGPA and the CGPA percentage of the student.
Note: Consider all marks to be out of 100, for each subject.

CGPA(Cumulative Grade Point Average) is the systematic arrangement in the educational stream to get an average of grade points.

Examples:

Input: arr[] = {90, 80, 70, 80, 90}
Output: CGPA = 8.2, Percentage = 77.89
Explanation:
The grade in each subject respectively out of 10 is {9, 8, 7, 8, 9}.
The CGPA is the average of all the grades = (9 + 8 + 7 + 8 + 9) / 5 = 8.2
The percentage of this CGPA is 77.89.

Input: arr[] = {90, 90, 90, 80, 85}
Output: CGPA = 8.7, Percentage = 82.65

Approach: In this article, the CGPA is calculated on a scale of 10.

• Input the array from the user containing the marks of the student in N subjects.
• Since the scale is on 10, divide marks in every subject by 10 to find the GPA of the student in each subject.
• The average of all the GPA’s yield the overall CGPA of the student.
• After finding the CGPA, the CGPA percentage can be calculated by the formula:
`CGPA% = CGPA * 9.5`
• This is a general formula for a scale of 10. However, if the entire calculation is made on a scale of 4, this 9.5 is thereby multiplied by 2.5 and the CGPA percentage is found by multiplying with 23.75.

Below is the implementation of the above approach:

## C++

 `// C++ program to calculate the CGPA``// and CGPA percentage of a student``#include``using` `namespace` `std;` `double` `CgpaCalc(``double` `marks[], ``int` `n)``{``    ``// Variable to store the grades in``    ``// every subject``    ``double` `grade[n];` `    ``// Variables to store CGPA and the``    ``// sum of all the grades``    ``double` `cgpa, sum = 0;` `    ``// Computing the grades``    ``for``(``int` `i = 0; i < n; i++)``    ``{``       ``grade[i] = (marks[i] / 10);``    ``}` `    ``// Computing the sum of grades``    ``for``(``int` `i = 0; i < n; i++)``    ``{``       ``sum += grade[i];``    ``}` `    ``// Computing the CGPA``    ``cgpa = sum / n;` `    ``return` `cgpa;``}` `// Driver code``int` `main()``{``    ``int` `n = 5;``    ``double` `marks[] = { 90, 80, 70, 80, 90 };` `    ``double` `cgpa = CgpaCalc(marks, n);``        ` `    ``cout << ``"CGPA = "``;``    ``printf``(``"%.1f\n"``, cgpa);``    ``cout << ``"CGPA Percentage = "``;``    ``printf``(``"%.2f"``, cgpa * 9.5);``}` `// This code is contributed by Bhupendra_Singh`

## Java

 `// Java program to calculate the CGPA``// and CGPA percentage of a student` `import` `java.util.Scanner;``class` `CGPA {` `    ``public` `static` `double` `CgpaCalc(``double``[] marks, ``int` `n)``    ``{``        ``// Variable to store the grades in``        ``// every subject``        ``double` `grade[] = ``new` `double``[n];` `        ``// Variables to store CGPA and the``        ``// sum of all the grades``        ``double` `cgpa, sum = ``0``;` `        ``// Computing the grades``        ``for` `(``int` `i = ``0``; i < n; i++) {``            ``grade[i] = (marks[i] / ``10``);``        ``}` `        ``// Computing the sum of grades``        ``for` `(``int` `i = ``0``; i < n; i++) {``            ``sum += grade[i];``        ``}` `        ``// Computing the CGPA``        ``cgpa = sum / n;` `        ``return` `cgpa;``    ``}` `    ``// Driver code``    ``public` `static` `void` `main(String args[])``    ``{` `        ``int` `n = ``5``;``        ``double``[] marks``            ``= { ``90``, ``80``, ``70``, ``80``, ``90` `};` `        ``double` `cgpa = CgpaCalc(marks, n);` `        ``System.out.println(``            ``"CGPA = "` `+ cgpa);``        ``System.out.println(``            ``"CGPA Percentage = "``            ``+ String.format(``"%.2f"``, cgpa * ``9.5``));``    ``}``}`

## Python3

 `# Python3 program to calculate the CGPA``# and CGPA percentage of a student``def` `CgpaCalc(marks, n):` `    ``# Variable to store the grades in``    ``# every subject``    ``grade ``=` `[``0``] ``*` `n``  ` `    ``# Variables to store CGPA and the``    ``# sum of all the grades``    ``Sum` `=` `0``  ` `    ``# Computing the grades``    ``for` `i ``in` `range``(n):``       ``grade[i] ``=` `(marks[i] ``/` `10``)``  ` `    ``# Computing the sum of grades``    ``for` `i ``in` `range``(n):``       ``Sum` `+``=` `grade[i]``  ` `    ``# Computing the CGPA``    ``cgpa ``=` `Sum` `/` `n``  ` `    ``return` `cgpa``  ` `# Driver code``n ``=` `5``marks ``=` `[ ``90``, ``80``, ``70``, ``80``, ``90` `]` `cgpa ``=` `CgpaCalc(marks, n)``      ` `print``(``"CGPA = "``, ``'%.1f'` `%` `cgpa)``print``(``"CGPA Percentage = "``, ``'%.2f'` `%` `(cgpa ``*` `9.5``))` `# This code is contributed by divyeshrabadiya07`

## C#

 `// C# program to calculate the CGPA``// and CGPA percentage of a student``using` `System;` `class` `GFG{` `public` `static` `double` `CgpaCalc(``double``[] marks,``                              ``int` `n)``{``    ` `    ``// Variable to store the grades in``    ``// every subject``    ``double` `[]grade = ``new` `double``[n];` `    ``// Variables to store CGPA and the``    ``// sum of all the grades``    ``double` `cgpa, sum = 0;` `    ``// Computing the grades``    ``for``(``int` `i = 0; i < n; i++)``    ``{``        ``grade[i] = (marks[i] / 10);``    ``}` `    ``// Computing the sum of grades``    ``for``(``int` `i = 0; i < n; i++)``    ``{``        ``sum += grade[i];``    ``}` `    ``// Computing the CGPA``    ``cgpa = sum / n;` `    ``return` `cgpa;``}` `// Driver code``public` `static` `void` `Main(String []args)``{``    ``int` `n = 5;``    ``double``[] marks = { 90, 80, 70, 80, 90 };``    ``double` `cgpa = CgpaCalc(marks, n);` `    ``Console.WriteLine(``"CGPA = "` `+ cgpa);``    ``Console.WriteLine(``"CGPA Percentage = {0:F2}"``,``                      ``cgpa * 9.5);``}``}` `// This code is contributed by Amit Katiyar`

## Javascript

 ``

Output:

```CGPA = 8.2
CGPA Percentage = 77.90```

Time Complexity: O(n)

Auxiliary Space: O(n)

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