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scope variable in JavaScript

scope variable in JavaScript


The scope is set of objects, variables and function and the JavaScript can have global scope variable and local scope variable.

The global scope is a window object and its used out of function and within the functions.
The local scope is a function object and its used within the functions.

The example for global scope variable

    var gblVar = "Anil Singh";

    function getDetail() {
        console.log(gblVar);
    }

and other example for global

    function demoTest() {
        x = 15;
    };
    console.log(x); //out put is 15

The example for local scope variable

    function getDetail() {
        var gblVar = "Anil Singh";
        console.log(gblVar);
    }

and other example for local

    function demoText() {
        var x = 15;
    };
    console.log(x); //undefined


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