In C#, if-else statements are your basic tools for decision-making—letting your code behave differently based on conditions you define.

🧪 Basic Structure

if (condition)
{
    // Code runs if condition is true
}
else
{
    // Code runs if condition is false
}

Example:

int age = 18;

if (age >= 18)
{
    Console.WriteLine("You're an adult.");
}
else
{
    Console.WriteLine("You're a minor.");
}

🔀 Using else if for Multiple Conditions

int score = 85;

if (score >= 90)
{
    Console.WriteLine("Grade: A");
}
else if (score >= 80)
{
    Console.WriteLine("Grade: B");
}
else
{
    Console.WriteLine("Keep trying!");
}

⚡ Shortcut: Ternary Operator

Great for simple, one-line decisions:

string result = (age >= 18) ? "Adult" : "Minor";
Console.WriteLine(result);

🛡 Tips for Clean Logic

• Always use {} braces—even for single lines—to prevent bugs
• Conditions must resolve to true or false
• Watch out for = (assignment) vs. == (comparison)!