javascript-with-sai/functions.html at master · junaid537/javascript-with-sai · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        /*
        1.
        Function Declaration(FD) and Function Expresson(FE)
        FD has hoisting , FE has no hoisting.
        FE uses variable assignment ,FD uses function-name


        2..
        Arrow function

        const  variable-name=()=>{

        }
        if only single param , no need of parantheses.
        if only single line of code in body no need of flower brackets and no need of return keyword , automatically returns
        */


       //3
       function add(a,b){
            const sum=a+b;
            return sum;
       }

       //4...
       const mul=function(a,b){
            return a*b;
       }

       //5..
       const sub=(a,b)=>a-b;

       //6..
       function reverseString(str) {
             return str.split('').reverse().join('')

            }
            console.log(reverseString('junaid'));

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