C# switch

In C#, the switch statement is used to evaluate an expression and execute different blocks of code based on the value of that expression. It provides a way to simplify multiple if-else statements when checking for different conditions.

Here’s the basic syntax of a switch statement in C#:

switch (expression)
{
    case value1:
        // Code block to be executed if expression matches value1
        break;
    case value2:
        // Code block to be executed if expression matches value2
        break;
    // Add more cases as needed
    default:
        // Code block to be executed if expression doesn't match any cases
        break;
}

Here’s a breakdown of the different parts of a switch statement:

• expression is the value that is being evaluated.
• case value1 is a specific value that is compared to the expression.
• // Code block refers to the block of code that is executed if the expression matches the specified value.
• break is used to exit the switch statement once a match is found. Without it, the execution would continue to the next case.
• default is an optional case that is executed if the expression doesn’t match any of the specified cases. It’s similar to the else part of an if-else statement.

Here’s an example to illustrate the usage of switch:

int num = 2;

switch (num)
{
    case 1:
        Console.WriteLine("The number is 1");
        break;
    case 2:
        Console.WriteLine("The number is 2");
        break;
    case 3:
        Console.WriteLine("The number is 3");
        break;
    default:
        Console.WriteLine("The number is not 1, 2, or 3");
        break;
}

In this example, if the value of num is 2, the output will be “The number is 2” because it matches the case 2 condition.