It was used to "jump out" of a switch statement.. Therefore, x … The following while loop iterates as long as n is less than three. Examples Using while. JavaScript supports different kinds of loops: for - loops through a block of code a number of times In a while loop, it jumps back to the condition. A label is simply an identifier followed by a colon (:) that is applied to a statement or a block of code.

This example jumps out of the loop when i is equal to 4: Unlike C, these labels can only be used for continue and break, as Javascript does not have goto.

The JavaScript while statement creates a loop that executes a block of code as long as the test condition evaluates to true. 如需标记 JavaScript 语句，请将标签名和冒号置于语句之前： label: statements. While executing these loops, if the JavaScript compiler finds the break statement inside them, the loop will stop running the statements and immediately exit from the loop. The JavaScript Break Statement is very useful to exit from any loop such as JavaScript For Loop, While Loop, and Do While Loop. The break statement can also be used to jump out of a loop.. JavaScript 标签. while loop An infinite while loop break; Break out from while loop in JavaScript James Hibbard explains the pitfalls of implementing a sleep function in JavaScript, and digs into solutions for dealing with JavaScript timing issues. You have already seen the break statement used in an earlier chapter of this tutorial. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, PHP, Python, Bootstrap, Java and XML. Starting from JavaScript 1.2, a label can be used with break and continue to control the flow more precisely. JavaScriptの基本的な制御構文であるループ処理のor文とwhile文を扱います。反復処理の同じコードを繰り返し書く必要が無くなります。反復処理の終了条件の前にcontinueやbreakを使って処理の途中でスキップや中断ができます。

break 和 continue 语句是仅有的可“跳出”代码块的 JavaScript 语句。 语法： break labelname; continue labelname; continue 语句（不论有无标签引用）只能用于跳过一个迭代。 The while statement creates a loop that is executed while a specified condition is true. The loop will continue to run as long as the condition is true. It will only stop when the condition becomes false. Java Break. loop1: for (var i in set1) { loop2: for (var j in set2) { loop3: for (var k in set3) { break loop2; // breaks out of loop3 and loop2 } } } as defined in EMCA-262 section 12.12. var n = 0; var x = 0; while (n < 3) { n++; x += n; } Each iteration, the loop increments n and adds it to x.

See JavaScript.

It stops the loop immediately, passing control to the first line after the loop. We will see two different examples to understand how to use labels with break and continue. The break directive is activated at the line (*) if the user enters an empty line or cancels the input. Note: Use the break statement to stop a loop before condition evaluates to true. The following illustrates the syntax of the while statement.

Namely, alert. In a for loop, it jumps to the update expression. while (expression) { // statement} The while statement evaluates the expression before each iteration of the loop. The continue statement can include an optional label that allows the program to jump to the next iteration of a …


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