The While Loop Thewhileloop loops through a block of code as long as a specified condition is true. Syntax while(condition) { // code block to be executed } Example In the following example, the code in the loop will run, over and over again, as long as a variable (i) is less th...
JavaScript While 循环JS For JS Break 只要指定条件为 true,循环就可以一直执行代码。while 循环 While 循环会在指定条件为真时循环执行代码块。 语法 while (条件) { 需要执行的代码 } 实例 本例中的循环将继续运行,只要变量 i 小于 5: while (i<5) { x=x + "The number is " + i + ""; i++...
Flowchart of JavaScript while loop Example 1: Display Numbers From 1 to 3 // initialize variable i let i = 1; // loop runs until i is less than 4 while (i < 4) { console.log(i); i += 1; } Run Code Output 1 2 3 Here is how the above program works in each iteration ...
JavaScript While 循环 只要指定条件为 true,循环就可以一直执行代码。 while 循环 While 循环会在指定条件为真时循环执行代码块。 语法 while (条件) { 需要执行的代码 } 实例 本例中的循环将继续运行,只要变量 i 小于 5: while (i<5) { x=x + "The number is " + i + ""; i++; } 亲自试一试 ...
While Loop TheJavaScript while loopconsists of a condition and the statement block. while (condition) {...statements...} The condition is evaluated. If the condition is true the statements are evaluated. If the statement is false we exit from the while loop. ...
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 ...
In JavaScript do while loop executes a statement block once and then repeats the execution until a specified condition evaluates to false.Syntaxdo { statement block } while (condition); In while loop, the given condition is tested at the beginning, i.e. before executing any of the statements...
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 ...
当设置一次函数(下面的代码)时,一切都可以,但这个提示窗口应该累积,直到一个整数(从200开始)的变量达到0,所以我认为do-while循环就可以了。但是,当设置do while循环时,输入数字后会立即显示提示窗口,并且不会更改任何内容。我还更改了代码,直到循环变得无限大,我的brwoser崩溃。我知道dowhile循环中的条件总是真的...
If EXECJS_RUNTIME environment variable is specified, PyExecJS pick the JavaScript runtime as a default: >>> execjs.get().name # this value is depends on your environment. >>> os.environ["EXECJS_RUNTIME"] = "Node" >>> execjs.get().name 'Node.js (V8)' You can choose JavaScrip...