More on JavaScript for...in Loop You can also use thefor...inloop to iterate overstringvalues. For example, conststring ='code';// using for...in loopfor(letiinstring) {console.log(string[i]); }; Run Code Output c o d e JavaScript for...in With Arrays You can also usefor......
Flowchart of JavaScript for loop Example 1: Print Numbers From 1 to 5 for (let i = 1; i < 6; i++) { console.log(i); } Run Code Output 1 2 3 4 5 In this example, we have printed numbers from 1 to 5 using a for loop. Here is how this program works: IterationVariable...
Using let in a loop:Example let i = 5; for (let i = 0; i < 10; i++) { // some code} // Here i is 5 Try it Yourself » In the first example, using var, the variable declared in the loop redeclares the variable outside the loop. ...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 [me@linuxbox ~]$ for i in A B C D; do echo $i; done A B C D In this example, for is given a list of four words: “A”, “B”, “C”, and “D”. With a list offour words, the loop is executed four times. Each tim...
Running the JavaScript code above will result in the following output. Output [ 0 ] [ 0, 1 ] [ 0, 1, 2 ] We set a loop that runs untili < 3is no longertrue, and we’re telling the console to print thearrayExamplearray to the console at the end of each iteration. With this ...
JavaScript for (var i = 0; i <= 4; i++) { console.log(i); } 0 1 2 3 4 See, the output is the same. Apart from this, it's also not necessary to declare the loop variable in the loop's header — it could be declared before as well. For example, the same code above co...
JavaScript Patterns 2.4 For-in loop Principle Enumeration should be used to iterate over nonarray objects. It's important to use the methodhasOwnProperty()when iterating over object properties to filter out properties that come down the prototype chain....
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 ...
Live Example Later on in this page, once we discover the while loop, we'll extend this code to keep repeating the input prompt as long as the entered value is not valid. As we shall see later on in the JavaScript Conditionals chapter, and even in general throughout this course, tons ...
属性arrCustom和objCustom没有被打印,因为它们是继承属性。 for...of循环迭代并打印iterable按照数组(数组是可迭代的)定义要进行迭代的值。对象的元素3、5、7被打印,但对象的属性没有被打印。 Specification ECMAScript® 2026 Language Specification #sec-for-in-and-for-of-statements...