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Student Grade Calculator

Part of the Fundamentals section of Coddy's C# journey — lesson 69 of 69.

Challenge

Easy

Create a method named CalculateAverageGrade that takes an array of integers (representing student grades) as input and returns the average grade as a double. The method should do the following:

Calculate the sum of all grades in the array.
Calculate the average grade by dividing the sum by the number of grades.
Return the average grade
Print the result using the following format: Average grade: [The result].

Try it yourself

using System;

public class Program {
    public static double CalculateAverageGrade(int[] grades) {
        // Write your code here
    }

    public static void Main(string[] args) {
        string text = Console.ReadLine();
        string[] stringArr = text.Split(",");
        int[] studentGrades = new int[stringArr.Length];
        for (int i = 0; i < stringArr.Length; i++) {
           studentGrades[i] = int.Parse(stringArr[i]);
        }
        double averageGrade = CalculateAverageGrade(studentGrades);
        Console.WriteLine($"Average grade: {averageGrade}");
    }
}

All lessons in Fundamentals

1Introduction

C#Hello World!Comments Basic Program Structure

4Operators Part 1

Arithmetic Operators Modulo Operator Increment/Decrement Post Increment/Decrement Arithmetic Shortcuts

7Basic IO

Basic Output String Interpolation Reading Input Parse Recap - Till 120 Recap - True or False

10Methods (Functions)

Declaring Methods Method Parameters Return Types Optional Parameters Recap - Validation Function Void Methods

13Iterating Over Collections

Using For Loop Foreach Loop Common Array Operations

2Variables Part 1

Numbers Char String Boolean Type Declaration

5Operators Part 2

Comparison Operators Logical Operators Part 1 Logical Operators Part 2 Recap - Simple Logic Logical Operators Part 3

8Calculator App

Welcome Message Getting Numbers

Project lesson

Basic Operations

Project lesson

Formatted Output

Project lesson

11Arrays Basics

Declaring Arrays Accessing Elements Modifying Arrays Array Methods Recap - Product Array Edit Recap - Reversed Array

14Final Challenges

Number Pattern Pattern FinderStudent Grade Calculator

3Variables Part 2

Var Constants Naming Conventions Recap - Initialize Variables Type Casting

6Decision Making

If Statement If - Else Switch Statement Ternary Operator Recap - If Else Nested If - Else

9Loops

For Loop While Loop Do While Loop Break Continue Nested Loop Infinite Loop Recap - Dynamic Input

12String Operations

String Methods Part 1 String Methods Part 2 String Formatting