Home Web Front-end JS Tutorial There are several ways of for loop in js

There are several ways of for loop in js

May 01, 2024 am 07:42 AM
iterable object

Types of for loops in JavaScript

In JavaScript, there are three types of for loops:

1. Basic for loop

Syntax:

<code>for (initialization; condition; increment/decrement) {
  // 循环体
}</code>
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  • initialization: Initialization operation at the beginning of the loop.
  • condition: The condition that determines whether the loop continues. If the condition is false, the loop will be exited.
  • increment/decrement: The operation performed after each loop iteration. Used to update loop variables.

2. for...in loop

Syntax:

<code>for (variable in object) {
  // 循环体
}</code>
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  • variable:Use Variable for the key of the iterated object.
  • object: The object to be iterated. The object can be an object or an array.

3. for...of loop

Syntax:

<code>for (variable of iterable) {
  // 循环体
}</code>
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  • variable:Use A variable used to iterate over the elements in an iterable object (such as an array).
  • iterable: Iterable object. The object can be an array, string, or other data structure that supports iteration.

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