Arithmetic operators in C Sharp (C#)

Introduction

Arithmetic operators help you do math with numbers in your program. They let you add, subtract, multiply, and divide values easily.

Calculating the total price of items in a shopping cart.

Finding the average score of a student.

Increasing or decreasing a counter in a game.

Splitting a bill evenly among friends.

Converting units, like inches to centimeters.

Syntax

C Sharp (C#)

result = value1 + value2;  // addition
result = value1 - value2;  // subtraction
result = value1 * value2;  // multiplication
result = value1 / value2;  // division
result = value1 % value2;  // remainder (modulus)

Use + to add, - to subtract, * to multiply, / to divide, and % to get the remainder.

Division between integers gives an integer result (no decimals). Use floating-point numbers for decimal results.

Examples

Adds 5 and 3 to get 8.

C Sharp (C#)

int sum = 5 + 3;  // sum is 8

Subtracts 4 from 10 to get 6.

C Sharp (C#)

int difference = 10 - 4;  // difference is 6

Multiplies 7 by 6 to get 42.

C Sharp (C#)

int product = 7 * 6;  // product is 42

Divides 20 by 4 to get 5, and finds remainder of 20 divided by 3 is 2.

C Sharp (C#)

int quotient = 20 / 4;  // quotient is 5
int remainder = 20 % 3;  // remainder is 2

Sample Program

This program shows how to use all the basic arithmetic operators with two numbers, 15 and 4. It prints the results for each operation.

C Sharp (C#)

using System;

class Program
{
    static void Main()
    {
        int a = 15;
        int b = 4;

        int sum = a + b;
        int difference = a - b;
        int product = a * b;
        int quotient = a / b;
        int remainder = a % b;

        Console.WriteLine($"Sum: {sum}");
        Console.WriteLine($"Difference: {difference}");
        Console.WriteLine($"Product: {product}");
        Console.WriteLine($"Quotient: {quotient}");
        Console.WriteLine($"Remainder: {remainder}");
    }
}

Important Notes

Remember that dividing two integers will cut off decimals. For example, 15 / 4 is 3, not 3.75.

Use double or float types if you want decimal results.

The modulus operator % gives the remainder after division, useful for checking if a number is even or odd.

Summary

Arithmetic operators let you do basic math in your code.

Use +, -, *, /, and % for addition, subtraction, multiplication, division, and remainder.

Integer division drops decimals; use floating-point types for precise division.