C# switch Statement

The switch statement in C# allows you to test a variable against multiple values and execute different blocks of code depending on the match. It provides a more concise way to write multiple if...else statements.

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

switch (variable)
{
    case value1:
        // code to execute if variable matches value1
        break;
    case value2:
        // code to execute if variable matches value2
        break;
    // more cases as needed
    default:
        // code to execute if variable doesn't match any of the cases
        break;
}

The variable is the expression that you want to test against the different values. The case keyword is followed by a value to match against the variable. If variable matches a case value, the corresponding block of code will be executed. The break keyword is used to exit the switch statement after a case is matched. If no match is found, the default block will be executed.

Here's an example of using a switch statement to determine the day of the week:

int dayOfWeek = 4;

switch (dayOfWeek)
{
    case 1:
        Console.WriteLine("Monday");
        break;
    case 2:
        Console.WriteLine("Tuesday");
        break;
    case 3:
        Console.WriteLine("Wednesday");
        break;
    case 4:
        Console.WriteLine("Thursday");
        break;
    case 5:
        Console.WriteLine("Friday");
        break;
    case 6:
        Console.WriteLine("Saturday");
        break;
    case 7:
        Console.WriteLine("Sunday");
        break;
    default:
        Console.WriteLine("Invalid day of week");
        break;
}

In this example, the program tests the value of dayOfWeek against different cases and prints out the corresponding day of the week. If dayOfWeek doesn't match any of the cases, the default block will be executed, printing out an error message.

Note that the switch statement can also be used with other types of expressions, such as strings and enums, not just integers.