Logical Operators

Logical Operators

Logical operators combine boolean expressions: && (AND), || (OR), and ! (NOT). && and || short-circuit — if the left side already determines the result, the right side is never evaluated. This matters when the right side has side effects.

Note: Short-circuiting lets you safely write if (obj != null && obj.IsValid) without a null-check exception.

Example: Logical Operators

using System;

class Program
{
    static void Main(string[] args)
    {
        bool isLoggedIn = true;
        bool isAdmin = false;

        Console.WriteLine(isLoggedIn && isAdmin);
        Console.WriteLine(isLoggedIn || isAdmin);
        Console.WriteLine(!isAdmin);
    }
}