What is the difference between Let, var & Const in Javascript/Typescript

In JavaScript/TypeScript, let, var, and const are used for declaring variables. However, there are some differences between them:

1. var:
   • It is function-scoped.
   • Its value can be reassigned.
   • It can be hoisted (which means it can be accessed before it is declared).
   • It does not need to be initialized when declared.
2. let:
   • It is block-scoped.
   • Its value can be reassigned.
   • It cannot be hoisted.
   • It needs to be initialized when declared (i.e., assigned a value).
3. const:
   • It is also block-scoped.
   • Its value cannot be reassigned.
   • It cannot be hoisted.
   • It needs to be initialized when declared.