JavaScript/lec12.html at main · Anuradha0066/JavaScript · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
//CALLBACK FUNCTION

// function check(num,fn){
//     return fn(num)
// }

// function checkNum(){
//     return typeof num == "number"
// }
// check(10,checkNum)

//CLOSURE
        // function outer(){
        //     let userName="lob";
        //     function printName(){
        //         console.log(userName);


        //     }
        //  printName()
        // }
        // outer()

    //      function outer(){
    //         let userName="lob";
    //         function printName(){
    //             console.log(userName);


    //         }
    //   return printName
    //     }
    //    let fn= outer()
    //    fn()

    function counter(){
        let count=0
        return{
            getCount:function(){
                return count;
            }
        }
    }
    let fn=counter()
    console.log(fn.getCount());

    </script>
</body>
</html>