<aside> Comparison operators and logical operations are essential for creating conditional logic in C# programs. They form the foundation of decision-making in your code.

</aside>

⚖️ Comparison Operators

Comparison operators evaluate relationships between values and return boolean (true/false) results.

Operator	Name	Example	Result
<	Less than	5 < 10	true
<=	Less than or equal to	5 <= 5	true
>	Greater than	10 > 5	true
>=	Greater than or equal to	10 >= 11	false
==	Equal to	5 == 5	true
!=	Not equal to	5 != 10	true

🔗 Logical Operators

Operator	Name	Description
&&	AND	Both conditions must be true

!	NOT	Inverts the boolean value

📝 Example Usage

// Basic comparison
int age = 25;
bool isAdult = age >= 18;  // true

// Combining conditions with AND
bool hasLicense = true;
bool canDrive = isAdult && hasLicense;  // true

// Using OR operator
bool isHoliday = false;
bool isWeekend = true;
bool canRest = isHoliday || isWeekend;  // true

// Using NOT operator
bool isWorking = !isHoliday;  // true

🎯 Common Use Cases

// Age verification
if (age >= 18 && hasLicense)
{
    Console.WriteLine("Can drive");
}

// Temperature check
int temperature = 25;
if (temperature < 0 || temperature > 30)
{
    Console.WriteLine("Extreme temperature!");
}

// Password validation
string password = "secret123";
bool isValid = password.Length >= 8 && password.Contains("123");

<aside> 💡 Best Practices: • Use parentheses to make complex conditions more readable • Combine operators carefully to avoid logical errors • Consider the order of evaluation in complex conditions • Use meaningful variable names for boolean values

</aside>

<aside> ⚠️ Common Pitfalls: • Confusing == (comparison) with = (assignment) • Not considering all possible conditions • Over-complicating logical expressions • Forgetting that && evaluates before ||

</aside>

🔄 Short-Circuit Evaluation

C# uses short-circuit evaluation for logical operators:

In&& operations, if the first condition is false, the second isn't checked
In|| operations, if the first condition is true, the second isn't checked

// Example of short-circuit evaluation
bool IsValid(string text)
{
    // If text is null, Length isn't checked (prevents NullReferenceException)
    return text != null && text.Length > 0;
}