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>
-
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>
-
variable:Use Variable for the key of the iterated object.
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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>
-
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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