How to Return Addition Functions for Multiple Numbers in JavaScript

1). Launch the standard, plain-text editor application that is available on your computer.
2). Enter the following code into the text editor:

<html>

<body>

<h1>Calculate Standard deviation</h1>

<script type="application/javascript" >

var stats=new Array()

function calcstats(a,b,c,d,e,f) {

var sumdev=0;

var standardev=0;

var results=new Array()

// averaging the numbers

var mean=(a+b+c+d+e+f)/6;

// subtracting the each number from the mean and squaring the difference

sumdev=sumdev+Math.pow((mean-a),2);

sumdev=sumdev+Math.pow((mean-b),2);

sumdev=sumdev+Math.pow((mean-c),2);

sumdev=sumdev+Math.pow((mean-d),2);

sumdev=sumdev+Math.pow((mean-e),2);

sumdev=sumdev+Math.pow((mean-f),2);

// dividing the result by the degrees of freedom

standardev=Math.sqrt(sumdev/5);

// storing the results in the array

results[0]=mean;

results[1]=standardev;

// returning the array

return results;

}

// function call to get average

// and storing the results in the array, stats

stats = calcstats(1, 5, 4, 6, 10, 18);

document.write ("The average is is " + stats[0]);

document.write ("");

document.write ("The Standard Deviation is +- " + stats[1]);

</script>

</body>

</html>
3). Click the "File" menu. Select the "Save" option. Save under the file name, "test.html."
4). Launch the web browser that is available on your computer. Click on the "File" menu item and select "Open File."
5). Locate the file "test.html" just created, select it with the mouse and then click on "Open."
6). Your browser should display:

The average is is 7.333333333333333

The Standard Deviation is +- 5.988878581726855