The meaning of break in c language

The break statement is used to exit the current loop or switch statement immediately. The specific functions are: 1. Exit the loop: When it appears in the loop body, it will exit the loop immediately. 2. Exit the switch statement: When it appears in the case branch, exit the switch statement immediately. 3. Labeled break statement: Allows you to exit from a nested structure.

The meaning of break statement in C language

The break statement is a jump statement in C language. Used to immediately exit the currently executing loop or switch statement and transfer control to the code immediately following it.

Usage:

The break statement can be used alone or with optional labels as parameters:

<code class="c">break;
// 或
break label;</code>

Function:

• Exit the loop: If the break statement appears within the loop body, it will immediately exit the loop and transfer control to the next statement after the loop.
• Exit the switch statement: If the break statement appears in the case branch of the switch statement, it will exit the switch statement immediately and continue execution of the statement immediately following it.

Labeled break statement:

The labeled break statement allows you to exit from a nested loop or switch statement. The label must be a valid identifier that appears before the target loop or switch statement in the break statement.

For example:

<code class="c">outer_loop:
for (int i = 0; i < 10; i++) {
    inner_loop:
    for (int j = 0; j < 5; j++) {
        if (条件) {
            break inner_loop;  // 退出内层循环
        }
    }
}</code>

Common usage:

break statement is usually used in C language for:

• processing Error or special situation
• Control the execution flow of a loop or switch statement
• Jump out of a nested structure

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