Comparison operators in C Sharp (C#)

Introduction

Comparison operators help you check if things are equal, bigger, or smaller. This lets your program make decisions.

Checking if a user entered the correct password

Deciding if a number is positive, negative, or zero

Comparing two scores to find the winner

Finding out if a value is within a certain range

Stopping a loop when a condition is met

Syntax

C Sharp (C#)

value1 == value2
value1 != value2
value1 > value2
value1 < value2
value1 >= value2
value1 <= value2

Use == to check if two values are equal.

Use != to check if two values are not equal.

Examples

This checks if a is less than b. It is true because 5 is less than 10.

C Sharp (C#)

int a = 5;
int b = 10;
bool result = a < b;  // true

This checks if the name is "Bob". It is false because the name is "Alice".

C Sharp (C#)

string name = "Alice";
bool isEqual = name == "Bob";  // false

This checks if x is not equal to 3.5. It is false because x is exactly 3.5.

C Sharp (C#)

double x = 3.5;
bool notEqual = x != 3.5;  // false

Sample Program

This program checks if a person is old enough to vote by comparing their age to the required age. It also checks if the age is exactly the required age.

C Sharp (C#)

using System;

class Program
{
    static void Main()
    {
        int age = 20;
        int requiredAge = 18;

        if (age >= requiredAge)
        {
            Console.WriteLine("You are old enough to vote.");
        }
        else
        {
            Console.WriteLine("You are not old enough to vote.");
        }

        bool isEqual = (age == requiredAge);
        Console.WriteLine($"Is age exactly {requiredAge}? {isEqual}");
    }
}

Important Notes

Remember to use double equals == for comparison, not a single equals =, which is for assignment.

Comparison operators return a bool value: true or false.

You can use comparison operators with numbers, characters, and strings.

Summary

Comparison operators let you compare two values.

They return true or false depending on the comparison.

Use them to make decisions in your program.