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 forLoops a code block while a condition is true ...
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 expr 表达式继续进行判断。直到表达式的值为假,才跳出循环,执行下面的语句。while 循环语句 示例 下面...
https://stackoverflow.com/questions/44481131/why-the-huge-time-difference-between-while-and-do-while-in-javascript https://stackoverflow.com/questions/39969145/while-loops-vs-for-loops-in-javascript https://stackoverflow.com/questions/5599027/the-do-while-statement...
for、for-in的确是使用管比较频繁的，但是额外还有两种循环语句，一种是while语句，一种是do-while语句...
也就是说,只要宏定义中存在多条语句,就可以用do-while把这些语句全部包裹起来,这样无论怎么使用这个宏,都不会有问题。 例如: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 if(0)OPT(i,j); 宏扩展之后代码为: 代码语言:javascript 代码运行次数:0 ...
JavaScript now supports five different types of loops:while— loops through a block of code as long as the condition specified evaluates to true. do…while— loops through a block of code once; then the condition is evaluated. If the condition is true, the statement is repeated as long as...
See also the continue statement to restart the do-while loop from the beginning. Example Let's look at an example that shows how to use a do-while loop in JavaScript. For example: varcounter=1;do{console.log(counter+' - Inside do-while loop on TechOnTheNet.com');counter++;}while(co...
do{// …}while((match=regexp.exec(str))); 但是,当你这样做时,就会在可读性上有所取舍。在while文档中有一个使用赋值作为条件部分,其中包含了我们的建议。 规范 Specification ECMAScript® 2026 Language Specification #sec-do-while-statement
While loop and do loop JavaScript Basics Basic Loops While loops are conditional loops where a condition is checked at the starting of the loop and if the condition is true then the statements inside the loop is executed. So the changes required in condition has to be inside the statement...
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 stateme...