What are global variables and local variables in JavaScript

This article will explain in detail what global variables and local variables are in JavaScript. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

PHP cycle

In PHP, we have the following loop statement:

While-Loop the code block as long as the specified condition is true

Do...while-execute the code block once, and then repeat the loop as long as the specified condition is true

For-Loop code block specified number of times

Foreach-iterates through each element in the array and loops through the code block

PHP while cycle

As long as the specified condition is true, the while loop executes the code block.

Note: in this example, the variable $x is first set to 1 ($xroom1). Then execute the while loop, as long as $x is less than or equal to 5 ($x on "what are global and local variables in JavaScript" this article is shared here, I hope the above content can be of some help to you, so that you can learn more knowledge, if you think the article is good, please share it out for more people to see.