15. Let vs Var vs Constant|Difference Between Var, Let, and Const| JavaScript tutorial for beginners
Let vs Var vs Constant|Difference Between Var, Let, and Const| JavaScript tutorial for beginners
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Hi All,
In this video, we will cover the difference between let, const and var variable declaration. We will also cover some good example of the implementation and see how they are different.
Some details on let, const and var:
1) All of them are ways of declaring variable in JavaScript.
2) ‘let’ and ‘const’ was introduced in ES6.
3) ‘let’ is block scoped.
4) ‘var’ was introduced before ES6 release.
5) ‘var’ is function scoped.
6) When we want to reassign some value to a variable ‘let’ is used.
7) When we declare a variable ‘const’, its value cannot be changed.
8)We have to be very careful before declaring any variable as ‘const’, as changing any variable declaring is not recommended and cause a lot of issue.
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