Arithmetic Operations in C# using Switch Cases | Function

Arithmetic operations in C# using switch cases and functions.

In this article, you will learn how to make arithmetic operations in C# using switch cases and functions.

Example

You should have knowledge of the following topics in C# programming to understand this program:

• C# Oops Concepts
• C# System Library
• C# Switch Case Statement
• C# Functions

Source Code

// Arithmetic Operators in C#
using System;

public class W3CW {
    // It's the driver function
    static public void Main (string[] args) {
        Console.WriteLine("Enter any two positive integer numbers:\n");
        int p = Convert.ToInt32(Console.ReadLine());
        int q = Convert.ToInt32(Console.ReadLine());
        
        int sum, sub, mul, mod;
        float div;
        
        // It will perform all arithmetic operations
        sum = p + q;
        sub = p - q;
        mul = p * q;
        div = (float)p / q;
        mod = p % q;
        
        // It will print the final output
        Console.WriteLine("Addition of       "+p+" + "+q+" = "+sum);
        Console.WriteLine("Subtraction of    "+p+" - "+q+" = "+sub);
        Console.WriteLine("Multiplication of "+p+" * "+q+" = "+mul);
        Console.WriteLine("Division of       "+p+" / "+q+" = "+div);
        Console.WriteLine("Modulus of        "+p+" % "+q+" = "+mod);
    }
}

Run

Output

Explanation

In the above program, we have taken input 9 and 6 from the user via the system console. Then we applied these arithmetic operations following addition, subtraction, multiplication, division, and modulus.

After that It will return these output values following: 15, 3, 54, 1.5, 3.

Arithmetic Operators in C# using Switch Case

// Arithmetic Operators in C# using Switch Case
using System;

public class W3CW {
    // It's the driver function
    static public void Main (string[] args) {
        Console.WriteLine("Enter any two positive integer numbers:\n");
        int p = Convert.ToInt32(Console.ReadLine());
        int q = Convert.ToInt32(Console.ReadLine());
        
        // It will suggest choosing an option to make the operation
        Console.WriteLine("Input your choice to make an operation\n");
        Console.WriteLine("1 :: for Addition");
        Console.WriteLine("2 :: for Subtraction");
        Console.WriteLine("3 :: for Multiplication");
        Console.WriteLine("4 :: for Division");
        Console.WriteLine("5 :: for Modulus");

        Console.WriteLine("\nEnter your choice:\n");
        int choice = Convert.ToInt32(Console.ReadLine());
        
        // It will perform all arithmetic operations
        // According to user's choice & print the final output
        switch (choice) {
            case 1:
                Console.WriteLine("Addition of "+p+" + "+q+" = "+(p + q));
                break;
                
            case 2:
                Console.WriteLine("Subtraction of "+p+" - "+q+" = "+(p - q));
                break;
                
            case 3:
                Console.WriteLine("Multiplication of "+p+" * "+q+" = "+(p * q));
                break;
                
            case 4:
                Console.WriteLine("Division of "+p+" / "+q+" = "+(float)(p + q));
                break;
                
            case 5:
                Console.WriteLine("Modulus of "+p+" % "+q+" = "+(p % q));
                break;
                
            default:
                Console.WriteLine("Kindly input correct choice!");
                break;
        }
    }
}

Run

Arithmetic Operators in C# using Functions

// Arithmetic Operators in C# using Functions
using System;

public class W3CW {
    // Function to make an Addition
    public static int Add(int a, int b) {
        return a + b;
    }
    
    // Function to make Subtraction
    public static int Sub(int a, int b) {
        return a - b;
    }
    
    // Function to make Multiplication
    public static int Mul(int a, int b) {
        return a * b;
    }
    
    // Function to make Division
    public static float Div(int a, int b) {
        return (float)(a / b);
    }
    
    // Function to make Modulus
    public static int Mod(int a, int b) {
        return a % b;
    }
    
    // It's the driver function
    static public void Main (string[] args) {
        Console.WriteLine("Enter any two positive integer numbers:\n");
        int p = Convert.ToInt32(Console.ReadLine());
        int q = Convert.ToInt32(Console.ReadLine());
        
        // It will print the final output
        Console.WriteLine("Addition of       "+p+" + "+q+" = "+Add(p,q));
        Console.WriteLine("Subtraction of    "+p+" - "+q+" = "+Sub(p,q));
        Console.WriteLine("Multiplication of "+p+" * "+q+" = "+Mul(p,q));
        Console.WriteLine("Division of       "+p+" / "+q+" = "+Div(p,q));
        Console.WriteLine("Modulus of        "+p+" % "+q+" = "+Mod(p,q));
    }
}

Run