What is the difference between let const and var when declaring variables in javascript

MCQ Answer

What is the difference between let, const, and var when declaring variables in JavaScript?

जावास्क्रिप्ट में वेरिएबल घोषित करते समय let, constऔर var के बीच क्या अंतर है?

Topic : JS Datatype

A. let and const are block-scoped, while var is function-scoped

B. var and let are block-scoped, while const is function-scoped

C. const and var are block-scoped, while let is function-scoped

D. They are all function-scoped

Correct Answer is :

A. let and const are block-scoped, while var is function-scoped