How to use the function syntax of JavaScript

Editor to share with you how to use the functional syntax of JavaScript, 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!

The function uses function functionname () {here is the code to be executed}

Syntax:

Parentheses can include parameters separated by commas:

(parameter 1, parameter 2,...)

The code executed by the function is placed in curly braces: {}

Function name (parameter 1, parameter 2, parameter 3) {code to be executed}

The function parameter (Function parameters) is the name listed in the function definition.

The function parameter (Function arguments) is the real value received by the function when the function is called

Call to the function:

/ / create a function sumfunction sum (num1, num2) {var result = num1 + num2; console.log ("num1 + num2 =" + result);} / / function call sum (10,20)

Execute the function immediately:

$(function () {/ / not only function all variable output and so on are written here are page loading and running sum ()}) above are all the contents of this article "how to use the function syntax of JavaScript". 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!