Lead UI Developer Interview Questions and Answers

var is function scoped, let is block scoped, const is block scoped and cannot be reassigned.

• var is function scoped, let is block scoped, const is block scoped and cannot be reassigned

• var can be redeclared and updated, let can be updated but not redeclared, const cannot be redeclared or updated

• Use const for values that should not change, use let for values that may change, use var sparingly