Javascript functions

Question

Write a JavaScript function to calculate difference of square values of two numbers passed as function arguements and to display the absolute value of it in an alert box.

<script>

function v(5,3){

var a =5 ;

var b =3;

var r =(a*a)-(b*b);

var s = Math.abs(r);

alert("Absolute value = "+s);

}

Why this is not working?

Answer 1

The correct answer should be'

v(5,3);

function v (a, b)

{

var r =(a*a)-(b*b);

var s = Math.abs(r);

alert("Absolute value = "+s);

}

You have to add the parameters to your function. You then have to call the function with the numbers you want to calculate in the function

Answer 2

Hi Ashley,

One of the reasons your program isn't working is because you're not calling the function v after it has been created. Calling a function in JS means that you are telling the program to run that specific function. After the last bracket of your program, if you add the line v(5, 3), your program will work.

Hopefully that answers your question.

Also just a quick question for you. Did you only want this program to work with 5 and 3 or did you want it to work with other numbers as well?

Thank you for your time,

Mel