FACTORIAL-USING-HTML-CSS-JAVASCRIPT/index.html at main · codetech-shivam/FACTORIAL-USING-HTML-CSS-JAVASCRIPT · GitHub

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<!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>
    <style>
        div{
            border: 2px solid blue;
            display: inline-block;
            margin-left: 100px;

        }
        p{
            color: red;

        }
        #shivam:hover{

        }
        #button{
            color: red;
            background-color: rgb(32, 18, 216);
            text-align: center;
            margin-left: 30px;
        }
        #button:hover{
            background-color: aqua;
            border: 2px solid green;
        }
        #print{
            background-color: rgb(26, 30, 24);
            display: inline-block;
            margin-left: 30px;
            margin-right: 30px;
            border-radius: 05px;
        }
        H1{
            color: red;
        }

    </style>
    <script>
        function fact(){
            var num;
            var sum=1;
            var p=document.getElementById('print');
            num=Number(document.getElementById('shivam').value);
            if(num<0){
                p.innerHTML="please enter a positive value"
            }
            else if(num==0){
                p.innerHTML=1;
            }
            else{
            for(var i=1;i<=num;i++){

                sum=sum*i;


            }
            p.innerHTML="factorial is "+sum ;
        }


        }


    </script>
</head>
<center>
<body>
    shivam
    <h1>SHIVAKANT SHUKLA </h1>
    <div>
    <p><input id="shivam" type="text" placeholder="enter a number"></p>
    <p><input id="button" type="button" value="print factorial" onclick='fact()'></p>
    <p id="print"></p>
</div>
</center>
</body>
</html>