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Scope in JavaScript

Scope in JavaScript

Scope is totally related to variables. Scope basically gives visibility of variables. Every variable has its scope, means, its birthplace, life area of visibility, and then a deathmark after which or outside of certain well-defined area (in terms of code), where it will not be identified to even exist.

Note: "Unlike most programming languages, JavaScript does not have block-level scope." (Though, in ES6, 'let' and 'const' are added to have this type of scope).

JavaScript does not have block level scope like -- Java, Python, C++, C# so it is very important to understand how variables and scopes are interrelated and what are the 2 types of scope in JavaScript.

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