How JavaScript uses the For Loop structure

Editor to share with you how JavaScript uses the For loop structure, I believe most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's go to know it!

For cycle

To traverse an array, you usually use a traditional for loop, or you can use a for...of loop to traverse. To access the index of each value, you can use a for...in loop.

Let arr = [10,20,30,40]; / / Longhand for (let I = 0; I < arr.length; iIndex +) {console.log (arr [I]);} / / Shorthand / / for of loop for (const val of arr) {console.log (val);} / / for in loop for (const index in arr) {console.log (arr);}

You can also use the for...in loop to traverse object properties.

Let obj = {x: 20, y: 50}; for (const key in obj) {console.log (obj [key]);} above is all the content of the article "how JavaScript uses the For Loop structure". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!