JavaScript - Difference Between let, const, And var

So for those confused let, const, and var are different modes of variable declaration in JavaScript.

And I will be explaining the difference between them in this article.

• Let -

Let makes it possible for us to declare a variable without assigning any value to it yet, and also allows us to assign a temporal value to a variable, which means the variable can be assigned a new value. So it’s much easier to use when you are working with temporal values. Let is block scoped.

• Const -

Const in the other hand does the opposite of let. Meaning that we can’t declare a variable with const and not assign a value to it immediately, and the variable declared can’t be assigned another value. So const is preferably used when working in a big project or with other developers to avoid bugs and other minimal errors. const is block scoped.

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. Var -

While var is the oldest means of declaring variables. There are issues associated with var which gave room to development of let and const. Var is function scoped.

N/B: Genesys Tech-Hub (learnable2022 task) by Prince Ezechi (w).