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Function Object

There are several ways to define a function in JavaScript:

Function Statement:

function functionname(arguments){ //standard function
statements...
}

function (arguments){ //unnamed function. JavaScript 1.2.
statements...
}

Constructor:

new Function(arguments, body)

Related Tutorials

• Functions and creating your own functions
• Robust functions via the arguments array
• Using named arguments in JavaScript functions

Properties

Methods

Examples

Function arguments object

This function below loops through all arguments (assumed to be numeric) passed into it and returns their sum using the "arguments" object:

function sumof(){
 var total=0
 for (var i=0; i<arguments.length; i++){
  total+=arguments[i]
 }
 return total
}

//sumof(2,3,4) //returns 9