JavaScript Workshop » Functions

Inside every function in JavaScript there exists a contextual variable named arguments that acts like a pseudo-array. This object contains all the arguments passed in to the function. Arguments isn't a true array (meaning that you can't modify it, or call .push() to add new items), but you can access items in the array, and it does have a length property.

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A function is a self-contained block of statements. Functions are very good at holding reusable code. You can declare a function by using the function keyword followed by the name of the function you want to create:

function myfunction() {
     // do something
}

You execute the function like this:

myfunction();

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