What is the difference between let and var in js?
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var
1.It has been available from the beginning of JavaScript I
2.It has function scope
3.Variable declaration will be hoisted, initialized as undefined
4.It is possible to re-declare the variable in the same scope.
let
1.introduced as part of ES6.
2.It has block scope
3.Hoisted but not initialized
4.It is not possible to re-declare the variable