This page is Ready to Use

Notice: The WebPlatform project, supported by various stewards between 2012 and 2015, has been discontinued. This site is now available on github.



An object representing the arguments to the currently executing function, and the functions that called it.


[ function . ] arguments[ n ]
Optional. The name of the currently executing Function object.
Required. The zero-based index to argument values passed to the Function object.


The following example illustrates the use of the arguments object.

function ArgTest(a, b)
    var s = "";

    s += "Expected Arguments: " + ArgTest.length;
    s += "<br />";
    s += "Passed Arguments: " + arguments.length;
    s += "<br />";

    s += "The individual arguments are: "
    for (n = 0; n < arguments.length; n++)
       s += ArgTest.arguments[n];
       s += " ";


 ArgTest(1, 2, "hello", new Date())

 // Output:
 // Expected Arguments: 2
 // Passed Arguments: 4
 // The individual arguments are: 1 2 hello Tues Jan 8 08:27:09 PST 20xx


You cannot explicitly create an arguments object. The arguments object only becomes available when a function begins execution. The arguments object of the function is not an array, but the individual arguments are accessed the same way array elements are accessed. The index n is actually a reference to one of the 0 n properties of the arguments object.

See also

Other articles


  • Microsoft Developer Network: Article