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This article mainly introduces "what cycle structure does javascript have". In daily operation, I believe many people have doubts about what cycle structure javascript has. The editor consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "what cycle structure does javascript have?" Next, please follow the editor to study!

The loop structures provided by javascript are: 1, for loop, traversing code blocks many times; 2, for/in loop, traversing object attributes; 3, while loop, cycling a block of code when the specified condition is true; 4, do/while loop, cycling a block of code when the specified condition is true.

This article operating environment: windows7 system, javascript1.8.5 version, Dell G3 computer.

What are the loop structures provided by javascript?

If you need to run the code multiple times and use different values each time, loop is quite convenient to use.

JavaScript supports different types of loops:

1.for-iterate over the code block many times

The syntax of the for loop is as follows:

For (statement 1; statement 2; statement 3) {Block of code to be executed}

2.for/in-traverses object properties

Grammar

For (key in object) {/ / code block to be executed}

3.while-Loops a block of code when the specified condition is true

Grammar

While (condition) {Block of code to be executed}

4.do/while-Loops a block of code when the specified condition is true

Grammar

Do {code block to be executed} while (condition); at this point, the study of "what loop structure does javascript have" is over, hoping to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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