The Do While Loop Thedo whileloop is a variant of the while loop. This loop will execute the code block once, before checking if the condition is true, then it will repeat the loop as long as the condition is true. Syntax do{
do while循环:先执行循环体,然后再判断条件 使用情况不同: 当循环次数固定时,建议使用for循环 当循环次数不固定,建议使用while循环、do while循环 先判断,再执行,则使用while循环 先执行,然后再判断,则使用do while循环 当循环条件第一次为false时,则: for 循环执行 0 次循环体 while 循环执行 0 次循环体 do...
In JavaScript do while loop executes a statement block once and then repeats the execution until a specified condition evaluates to false. Syntax do { statement block } while (condition); In while loop, the given condition is tested at the beginning, i.e. before executing any of the statemen...
In this article we show how to use the do keyword to create do...while loops in JavaScript. The do...while loop executes a block of code at least once before checking the condition. The do keywordThe do keyword is used to create a do...while loop in JavaScript. This loop executes ...
If the condition evaluates to false, the loop terminates. Flowchart of do...while Loop Flowchart of JavaScript do...while loop Example 3: Display Numbers from 3 to 1 let i = 3; // do...while loop do { console.log(i); i--; } while (i > 0); Run Code Output 3 2 1 Here...
The JavaScript While Loop Tutorial Syntax do{ code block to be executed } while(condition); Parameters ParameterDescription conditionRequired. The condition for running the code block. Iftrue, the loop will start over again, otherwise it ends. ...
do { 需执行的代码 } while(变量<=结束值) 3. break和continue break :可以终止循环,继续执行循环之后的代码(如果循环之后有代码的话)。 continue: 终止当前的循环,然后从下一个值继续运行。 4. For...in...声明语法: for (变量 in对象) {
while 循环(while loop): while 循环是一种条件循环,它只有当特定的条件为 true 时才会继续执行。类似的 do-while 循环用于在至少执行一次循环的情况; while循环的结构如下: while (condition) { // code to be executed } 1. 2. 3. while(condition)语句定义了循环的终止条件,只有该条件为真时,循环体内的...
while和do while循环语句 在程序开发中,存在大量的重复性操作或计算,这些任务必须依靠循环结构来完成。JavaScript 定义了while、for和do/while三种类型循环语句。 while语句 while 语句是最基本的循环结构。语法格式如下: while (expr) statement 当表达式 expr 的值为真时,将执行 statement 语句,执行结束后,再返回到...
do/while 循环 do/while 循环是 while 循环的变体。该循环会执行一次代码块,在检查条件是否为真之前,然后如果条件为真的话,就会重复这个循环。 语法 do { 需要执行的代码 } while (条件); 实例 下面的例子使用 do/while 循环。该循环至少会执行一次,即使条件是 false,隐藏代码块会在条件被测试前执行: ...