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...
do{ text +="The number is "+ i; i++; } while(i <10); Try it Yourself » Do not forget to increase the variable used in the condition, otherwise the loop will never end! Comparing For and While If you have read the previous chapter, about the for loop, you will discover that...
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 ...
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: do { x=x + "The ...
JavaScript 循环 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 ...
let flag = true; do { console.log("In loop"); // 应该在这里设置flag为false来退出循环 } while (flag); // 如果flag始终为true,循环将不会退出 异步操作:如果在循环中使用了异步操作(如setTimeout、fetch等),可能会导致循环提前退出,因为异步操作不会阻塞代码的执行。 代码语言:txt 复制 let ...
For、While、do-while loops 15、如何在JavaScript中将base字符串转换为integer? parseInt() 函数解析一个字符串参数,并返回一个指定基数的整数。...Break语句从当前循环中退出。 continue语句继续下一个循环语句。 29、在JavaScript中,dataypes的两个基本组是什么?...Logical Errors:这是由于在具有不同操作的...
JavaScript do...while Loop The do...while loop executes a block of code once, then repeatedly executes it as long as the specified condition is true. The syntax of the do...while loop is: do { // body of loop } while(condition); Here, The do…while loop executes the code inside...
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Iftrue, the loop will start over again, otherwise it ends. JavaScript Loop Statements StatementDescription breakBreaks out of a loop continueSkips a value in a loop whileLoops a code block while a condition is true do...whileLoops a code block once, and then while a condition is true ...