C# - Comparison Operators

Comparison Operators in C#

Comparison operators in C# are used to compare two values and return a boolean result (true or false) based on the comparison. These operators are essential for decision-making and flow control in programs. Below is a detailed explanation of each comparison operator with examples.

1. Equal To (==)

The == operator checks if two operands are equal. If they are equal, it returns true; otherwise, it returns false.

//syntax

bool result = operand1 == operand2;

//code
int a = 10;
int b = 20;
bool isEqual = (a == b); // isEqual is false

2. Not Equal To (!=)

The != operator checks if two operands are not equal. If they are not equal, it returns true; otherwise, it returns false.

//syntax
bool result = operand1 != operand2;


//Code
int a = 10;
int b = 20;
bool isNotEqual = (a != b); // isNotEqual is true

3. Greater Than (>)

The > operator checks if the left operand is greater than the right operand. If it is, it returns true; otherwise, it returns false.

//syntax
bool result = operand1 > operand2;



//Code
int a = 10;
int b = 20;
bool isGreater = (a > b); // isGreater is false

4. Less Than (<)

The < operator checks if the left operand is less than the right operand. If it is, it returns true; otherwise, it returns false.

//syntax
bool result = operand1 < operand2;




//Code
int a = 10;
int b = 20;
bool isLess = (a < b); // isLess is true

5.  Greater Than or Equal To (>=)

The >= operator checks if the left operand is greater than or equal to the right operand. If it is, it returns true; otherwise, it returns false.

//syntax
bool result = operand1 >= operand2;


//
int a = 10;
int b = 10;
bool isGreaterOrEqual = (a >= b); // isGreaterOrEqual is true

6. Less Than or Equal To (<=)

The <= operator checks if the left operand is less than or equal to the right operand. If it is, it returns true; otherwise, it returns false.

// syntax
bool result = operand1 <= operand2;


//code
int a = 10;
int b = 20;
bool isLessOrEqual = (a <= b); // isLessOrEqual is true

Example

Example 1: Checking Age Eligibility

int age = 18;
bool isEligibleToVote = (age >= 18);

if (isEligibleToVote)
{
    Console.WriteLine("You are eligible to vote.");
}
else
{
    Console.WriteLine("You are not eligible to vote.");
}

Example 2: Comparing Strings

string str1 = "hello";
string str2 = "world";
bool areStringsEqual = (str1 == str2); // areStringsEqual is false
bool areStringsNotEqual = (str1 != str2); // areStringsNotEqual is true

Console.WriteLine($"Are strings equal? {areStringsEqual}");
Console.WriteLine($"Are strings not equal? {areStringsNotEqual}");

Example 3: Checking if a Number is Within a Range

int number = 15;
bool isInRange = (number >= 10 && number <= 20);

if (isInRange)
{
    Console.WriteLine("The number is within the range.");
}
else
{
    Console.WriteLine("The number is out of the range.");
}

Summary