Factorial of a number.

In this JavaScript program, we will learn to calculate the factorial of a number. It represents the multiplication of all numbers between 1 and n. It is denoted by !.

Example

5! = 5*4*3*2*1 = 120.

Program

<html>

<head>

</head>

<body>

</body>

function getFact(n){

var fact = 1;

while(n>0){

fact = fact*n;

n--;

}

return fact;

}

document.getElementById('val').innerHTML= "Factorial of 5 = "+getFact(5);

</script>

</html>

<html> <head> </head> <body> <h1 style="color:green;text-align: center;margin-top: 20px;" id="val"></h1> </body> <script> function getFact(n){ var fact = 1; while(n>0){ fact = fact*n; n--; } return fact; } document.getElementById('val').innerHTML= "Factorial of 5 = "+getFact(5); </script> </html>

<html>
    <head>       
    </head>
    <body>        
        <h1 style="color:green;text-align: center;margin-top: 20px;" id="val"></h1>
    </body>
    <script>
        function getFact(n){
            var fact = 1;
            while(n>0){
                fact = fact*n;
                n--;
            }
            return fact;
        }         
        document.getElementById('val').innerHTML= "Factorial of 5 = "+getFact(5);
    </script>
</html>