undefined vs undeclared in JavaScript | Dynamic type and built-in-types | Episode-4 | LoveJavascript

Episode 4 of the LoveJavaScript series explores one of the most asked questions of JavaScript interview i.e, undefined and undeclared keywords, and what is the difference between undefined and undeclared or not declared keywords? I started the video by first explaining that JavaScript is a dynamically typed language and why this weakly typed language is helpful for better programming. We also discussed what are built-in-types in JavaScript and what is primitive values in JavaScript. Then I took a code example in visual studio code explained the difference between undefined and undeclared keywords and understood what is Reference error in JS means. We also talked about how memory allocations happen for any variables and functions during the memory creation phase.

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Thanks,
Satyendra

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