break in C#

In C#, the break keyword is used to terminate a loop or a switch statement and transfer control to the statement immediately following the loop or switch.

Here’s an example of using the break keyword inside a for loop:

for (int i = 0; i < 10; i++)
{
    if (i == 5)
    {
        break;
    }
    Console.WriteLine(i);
}

In this example, the for loop will iterate from i=0 to i=9. However, when i=5, the break statement is executed, and the loop terminates prematurely. Therefore, only the values of i from 0 to 4 will be printed to the console.

Here’s an example of using the break keyword inside a switch statement:

int x = 2;
switch (x)
{
    case 1:
        Console.WriteLine("x is 1");
        break;
    case 2:
        Console.WriteLine("x is 2");
        break;
    default:
        Console.WriteLine("x is neither 1 nor 2");
        break;
}

In this example, the switch statement evaluates the value of x and executes the corresponding case statement. When x=2, the second case statement is executed, and the break statement is encountered, causing the switch statement to terminate. Therefore, the output of this program is “x is 2”.

The rules for using the break keyword in C# are as follows:

1. The break statement can only be used inside a loop or a switch statement.
2. When the break statement is executed inside a loop, the loop immediately terminates, and the control flow resumes at the statement following the loop.
3. When the break statement is executed inside a switch statement, the switch statement immediately terminates, and the control flow resumes at the statement following the switch.

In summary, the break keyword is a useful tool for controlling the flow of execution in C# programs. By using the break keyword in loops and switch statements, you can terminate the loop or switch prematurely and transfer control to the next statement in your program.