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  1. #1
    Senior Member
    Join Date
    Jan 2013

    What is the main difference between var and let in JavaScript?

    What is the main difference between var and let in JavaScript?

  2. #2
    Join Date
    Nov 2017
    The difference is scoping. var is scoped to the nearest function block and let is scoped to the nearest enclosing block, which can be smaller than a function block. Both are global if outside any block.

    Also, variables declared with let are not accessible before they are declared in their enclosing block. As seen in the demo, this will throw a ReferenceError exception.
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  3. #3
    Registered User
    Join Date
    Sep 2017
    VAR- the JavaScript variables statement are used to declare the variable and we can initialize the value of that variable.

    LET- this refers to the local variable in a block scope. It is also similar to var and we can optionally initialize the variable.

  4. #4
    Registered User
    Join Date
    Feb 2014
    Scoping makes the difference. var's scope is function level but let is scoped in its enclosing block, that is ({}).

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