What are the keywords used to define methods in javascript

The keyword for defining methods in JavaScript is function; the syntax for using the function keyword is such as "function functionName(parameters) {executed code}".

The operating environment of this article: windows7 system, javascript version 1.8.5, Dell G3 computer.

JavaScript function definition

JavaScript uses the keyword function to define functions.

A function can be defined through a declaration or an expression.

Function declaration

In the previous tutorial, you have already understood the syntax of function declaration:

function functionName(parameters) { 执行的代码 }

The function will not be executed immediately after it is declared, but will be executed when we need it Called to.

Example

     
  
本例调用的函数会执行一个计算，然后返回结果：
 
   

Output:

本例调用的函数会执行一个计算，然后返回结果： 12

Recommended study: "javascript Advanced Tutorial"

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