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This article mainly introduces JavaScript how to use For to achieve circular sentences, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

JavaScript cycle

A loop can execute a block of code a specified number of times. JavaScript supports different types of loops:

For-A certain number of times to loop a block of code

For/in-Loop through the properties of the object

While-Loop the specified block of code when the specified condition is true

Do/while-also loop the specified block of code when the specified condition is true

It is convenient to use loops if you run the same code over and over again, and the values are different each time.

/ / We can output the value of the array as follows: [xss_clean] (cars [0] + "

"); [xss_clean] (cars [1] +"

"); [xss_clean] (cars [2] +"

"); [xss_clean] (cars [3] +"

"); [xss_clean] (cars [4] +"

"); [xss_clean] (cars [5] +"

"); / / but usually we write this: for (var iTune0): click here

Function myFunction () {var x; var txt= "; var person= {fname:" Bill ", lname:" Gates ", age:56}; for (x in person) {txt=txt + person [x];} document.getElementById (" demo ") [xss_clean] = txt;}

Note: in this example, the result returned when the button is clicked is "BillGates56".

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