Question

In: Computer Science

Write, test, and debug (if necessary) HTML file with the Javascript codes in an external file...

Write, test, and debug (if necessary) HTML file with the Javascript codes in an external file for the following problem:

Input: a number, n, using prompt, which is the number of the factorial numbers to be displayed.

Output: a bordered table of numbers with proper caption and headings in which the first column displays the numbers from 1 to n and the second column displays the first n factorial numbers.

For example, if a user enters 10 to be the value of n, the first column will include 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, and the second column will include 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800.

Your Javascript codes must include a function to compute the factorial number given an input number. This function is to be called to generate corresponding factorial number for each number in the first column of the table. You must use document.write to produce the desired output. Use the external CSS document for the display of the table.

Solutions

Expert Solution

If you have any problem with the code feel free to comment.

HTML

<!DOCTYPE html>

<html>

    <head>

        <title>Factorial</title>

        <link rel="stylesheet" href="style.css" />

    </head>

    <body>

        <script type="text/javascript" src="test.js"></script>

    </body>

</html>

CSS

body {

    width: 100%;

}

/* centering the table */

table {

    margin: 0 auto;

    text-align: center;

    border-collapse: collapse;

}

/* providing border to the table */

td {

    border: 2px solid black;

    padding: 10px;

}

/* changing the background color of table header */

.table-header {

    background-color: beige;

    font-size: 20px;

}

JAVASCRIPT

var n = parseInt(prompt('Enter the number'));//taking user input

//showing table structure

document.write('<table>');

document.write('<tr class="table-header">');

document.write('<td>Value</td>');    

document.write('<td>Factorial</td> </tr>');    

for(i=1; i<=n; i++){//traversing the user input

var f = findFactorial(i);

document.write('<tr><td>'+i+'</td>');    

document.write('<td>'+f+'</td> </tr>');   

}

document.write('</table>');

function findFactorial(value){//finding the factorial of the number

    var fact=1, j;

    for(j=1; j<=value; j++){

        fact = fact * j;

    }

    return fact;

}

OUTPUT

venereology answered 8 months ago
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