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<!DOCTYPE html>

<head>

<title>Closure</title>

</head>

<body>

// A closure is a fucntion having access to the parent scope. it preserve the data form outside.

// A closure is an inner fucntion that has access to the outer (enclosing) function's variables.

// for every closure we have three scopes.

// 1. local scope (own scope) 2. outer function scope 3. Global scope

// example

var a = 10;

function x(){

var b = 60;

document.write(b +"<br>");

document.write(a +"<br>");

}

x();

// example 2

function test(){

var c = "local variable outer function";

document.write(c +"<br>");

function inner(){

var d = "local variable inner fucntion";

document.write(d + "<br>");

}

inner();

}

test();

</script>

</body>

</html>