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C# Program to Display Text Grade Based on Numerical Grade

This C# program allows the user to input a numerical grade and then displays the corresponding text grade based on a predefined scale. The program implements two methods for determining the grade: one using if statements and the other using a switch statement. The user is asked to input a numerical grade, and depending on the value entered, the program will display the appropriate grade category as follows:

9, 10 = "Excellent"

7, 8 = "Very good"

6 = "Good"

5 = "Pass"

0-4 = "Fail"

The program will ask the user for a grade, first applying the if statement method and then using the switch statement method. This example demonstrates how both conditional logic structures can be used to solve the same problem.



Group

C# Flow Control Basics

Objective

Write a C# program to display the text grade corresponding to a given numerical grade, using the following equivalence:

9,10 = Excellent

7,8 = Very good

6 = Good

5 = Pass

0-4 = Fail

Your program should ask the user for a numerical grade and display the corresponding text grade. You should do this twice: first using "if" and then using "switch".

Example C# Exercise

 Copy C# Code 
using System;

class Program
{
    static void Main()
    {
        // Prompt for a numerical grade
        Console.Write("Enter your numerical grade: ");
        int grade = int.Parse(Console.ReadLine()); // Read the grade as an integer

        // --- Using "if" statement ---
        Console.WriteLine("\nGrade using 'if':");
        if (grade == 10 || grade == 9)
        {
            Console.WriteLine("Excellent");
        }
        else if (grade == 8 || grade == 7)
        {
            Console.WriteLine("Very good");
        }
        else if (grade == 6)
        {
            Console.WriteLine("Good");
        }
        else if (grade == 5)
        {
            Console.WriteLine("Pass");
        }
        else if (grade >= 0 && grade <= 4)
        {
            Console.WriteLine("Fail");
        }
        else
        {
            Console.WriteLine("Invalid grade entered");
        }

        // --- Using "switch" statement ---
        Console.WriteLine("\nGrade using 'switch':");
        switch (grade)
        {
            case 10:
            case 9:
                Console.WriteLine("Excellent");
                break;
            case 8:
            case 7:
                Console.WriteLine("Very good");
                break;
            case 6:
                Console.WriteLine("Good");
                break;
            case 5:
                Console.WriteLine("Pass");
                break;
            case int n when (n >= 0 && n <= 4):
                Console.WriteLine("Fail");
                break;
            default:
                Console.WriteLine("Invalid grade entered");
                break;
        }
    }
}

 Output

//Example 1: Numerical Grade = 8
Enter your numerical grade: 8

Grade using 'if':
Very good

Grade using 'switch':
Very good

//Example 2: Numerical Grade = 10
Enter your numerical grade: 10

Grade using 'if':
Excellent

Grade using 'switch':
Excellent

//Example 3: Numerical Grade = 4
Enter your numerical grade: 4

Grade using 'if':
Fail

Grade using 'switch':
Fail

//Example 4: Invalid Input (Numerical Grade = -1)
Enter your numerical grade: -1

Grade using 'if':
Invalid grade entered

Grade using 'switch':
Invalid grade entered

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More C# Practice Exercises of C# Flow Control Basics

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