undefined value mean in javascript

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undefined value mean in javascript

What does undefined value mean in javascript?

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November 12, 2010 at 1:19 PM

There can be multiple reasons of having undefined values

  1. Object does not exist. Like you create an object of a control which does not exists in your page and when you access it, it is undefined.

  2. No value is assigned to the object.

  3. If you are trying to access a property which does not exists for the object.

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