# null and undefined | kirupa.com

**URL:** <https://forum.kirupa.com/t/null-and-undefined-kirupa-com/360009>\
**Category:** programming\
**Created:** [November 24, 2014, 10:12pm UTC](https://forum.kirupa.com/t/null-and-undefined-kirupa-com/360009 "2014-11-24T22:12:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![kirupa](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/kirupa/32/11616_2.png) [@kirupa](https://forum.kirupa.com/u/kirupa)\
**Post date:** [November 24, 2014, 10:12pm UTC](https://forum.kirupa.com/t/null-and-undefined-kirupa-com/360009/1 "2014-11-24T22:12:30Z")

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by [kirupa](http://www.kirupa.com/me/index.htm) | 4 April 2014

One of the great mysteries of the world revolves around making sense of null and undefined. Most code you see is littered with them, and you've probably run into them yourself a few times. As mysteries go, making sense of null and undefined isn't particulary bizarre. It is just dreadfully boring...like the most boring (yet important) thing about JavaScript you'll ever have to learn.

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This is a companion discussion topic for the original entry at [http://www.kirupa.com/html5/null\_and\_undefined.htm](http://www.kirupa.com/html5/null_and_undefined.htm)