Undefined vs Not defined in JavaScript | Love U JavaScript Ep# 5

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Pakistan Creative Babar
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undefined is a special keyword in JavaScript and `undefined !== not defined`. JS is a loosely typed language (weakly typed language). This video covers an in-depth analysis of the undefined keyword and mistakes you should avoid while using this keyword. It is a special keyword in JS and it acts as a placeholder for variables until they are assigned any value in them.

Understand the difference between undefined and not defined in JS. Many developers assume that undefined is exactly the same as not defined, but that's not true. undefined is a value in JavaScript and in fact, it also takes up memory space. So watch this video to understand everything in deep.

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