Datatypes and variables

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Revision as of 21:28, 14 July 2009 by Michael (talk | contribs) (New page: =Data types= Though JavaScript is a [http://en.wikipedia.org/wiki/Weak_typing weakly typed] programming language, there are some data types between which JavaScript sometimes variables aut...)
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Data types

Though JavaScript is a weakly typed programming language, there are some data types between which JavaScript sometimes variables automatically converts:

null

Null means variable has no value at all. Do not confuse null with 0 (zero)! 0 is just a number, null means just no value or a empty or non-existent reference.

undefined

A value that is undefined is a value held by a variable right after it has been created and before a value has been assigned to it.

boolean

number

string