C#: Conditional Statements (if, else, switch)

In C#, conditional statements are used to execute a certain block of code only if a specified condition is true. There are three types of conditional statements in C#: if, else, and switch.

The if Statement

The if statement is used to execute a block of code only if a certain condition is true. Here's an example:

csharp
int x = 10;
int y = 5;
if (x > y)
{
    Console.WriteLine("x is greater than y");
}

In the code above, we declared two variables x and y, and used the if statement to check if x is greater than y. If the condition is true, the code inside the curly braces {} will be executed and the message "x is greater than y" will be displayed.

The else Statement

The else statement is used to execute a block of code if the condition specified in the if statement is false. Here's an example:

csharp
int x = 10;
int y = 5;
if (x > y)
{
    Console.WriteLine("x is greater than y");
}
else
{
    Console.WriteLine("x is not greater than y");
}

In the code above, we used the else statement to specify what should happen if the condition in the if statement is false. If the condition is false, the code inside the curly braces of the else statement will be executed and the message "x is not greater than y" will be displayed.

The switch Statement

The switch statement is used to execute a block of code based on the value of a specified expression. Here's an example:

csharp
int day = 3;
switch (day)
{
    case 1:
        Console.WriteLine("Monday");
        break;
    case 2:
        Console.WriteLine("Tuesday");
        break;
    case 3:
        Console.WriteLine("Wednesday");
        break;
    default:
        Console.WriteLine("Invalid day");
        break;
}

In the code above, we declared a variable day and used the switch statement to check its value. Based on the value of day, a different message will be displayed. If the value of day is not equal to 1, 2, or 3, the code inside the default case will be executed and the message "Invalid day" will be displayed.

In conclusion, conditional statements in C# allow you to execute a block of code only if a specified condition is true. By using the if, else, and switch statements, you can write more flexible and powerful programs.