What is the difference between "var" and "let"?

There are mainly 4 major differences between var & let.

1. Scoping - var is scoped to the nearest function block while let is scoped to the nearest enclosing block.
2. Redeclarations -var allows redeclaration of a variable in the same block while let doesn't.
3. JavaScript Hoisting - Variables and constants declared with let or const are not hoisted.
4. Global Window Object - Global variables declared with let are not added as property on the global window object.

• Best Answers:
• https://stackoverflow.com/a/11444416/1273882