Examples of functions with variable number of JavaScript parameters illustrate _javascript skills

Source: Internet
Author: User

Digression: Very early contact with JavaScript, but did not pay attention to it, see a lot of cool, very flashy web pages, there are JavaScript, Google in JavaScript application to me the most impact. I'm determined to learn it from scratch, so I have JavaScript & Ajax in this compartment. I'm going to write this column down as a learning note, so each article note may be short and one or two words are annotated.

JavaScript allows a function to pass a variable number of arguments because there is a arguments this built-in object, which is an array of all the arguments passed by a function. For example, it's clear.

Copy Code code as follows:

<! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" "HTTP://WWW.W3.ORG/TR/HTML4/LOOSE.DTD" >
<meta http-equiv= "Content-type" content= "text/html; Charset=utf-8 ">
<title>javascript function with variable number of parameters </title>
<mce:script language= "javascript" type= "Text/javascript" ><!--
function Testparams ()
{
var params = "";
for (var i=0; i<arguments.length; i++) {
params = params + "" + arguments[i];
}
alert (params);
}

Testparams ("abc", 123);
Testparams (123, "456", 789);
Testparams ();
--></mce:script>
<body>
</body>

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