JavaScript Forum

**Eddie12390** · 02-18-2008, 03:09 PM

Well I was writing a small jScript programs for fun. I wanted to have addition subtraction multipclication etc.
When I added the functions to be called by an html buton it did nothing.

Heres the code I used:

Code:

<html>
<head>
<title>Math calculator</title>
</head>
<body>
 
 
<script type="text/javascript">
 
//Math Calculator
//Code by Eddie Jones
 

function add(a,b,c)
{
var a = prompt("Enter first number", "Type number here");
var b = prompt("Enter second number", "Type number here");
var c = a+b;
document.write("Answer to addition problem is:"); document.write("<br>");
document.write("<br>");
document.write(c);
}

function multiply(d,e,f)
{
//getting variables to be used
var d = prompt("Enter first number", "Type number here");
var e = prompt("Enter second number, "Type number here");
 
//Answering the problem
var f = d*e;
 
//Multiplication answer
document.write("Answer to the mulplication problem is:"); document.write("<br>");
document.write("<br>")
document.write(f);
}

</script>
<input type="button" value="Addition" onclick="add()" > <br>
<br>
<input type="button" value="Multiplication" onclick="multiply()" > 
</body>
</html>

I named it math and saved it. (I used the // tags to remember what that part of the code did, I wrote the multiplication w/o functions and had the tags there, I just didnt bother to get rid of them)

**chrishirst** · 02-18-2008, 05:18 PM

and your question is?

**Eddie12390** · 02-18-2008, 09:02 PM

Oh sorry I cant believe I forgot that part :|

What did I do wrong in the code?

**JeremyMiller** · 02-19-2008, 06:13 AM

You were missing a closing double quote. You would have then found a few more issues and then come up with something like this:

HTML Code:

<html>
<head>
<title>Math calculator</title>
</head>
<body>


<script type="text/javascript">

//Math Calculator
//Code by Eddie Jones


function add(a,b,c)
{
var a = prompt("Enter first number", "Type number here");
var b = prompt("Enter second number", "Type number here");
var c = parseFloat(a)+parseFloat(b);
document.write("Answer to addition problem is:"); document.write("<br>");
document.write("<br>");
document.write(c);
}

function multiply(d,e,f)
{
//getting variables to be used
var d = prompt("Enter first number", "Type number here");
var e = prompt("Enter second number", "Type number here");

//Answering the problem
var f = parseFloat(d)*parseFloat(e);

//Multiplication answer
document.write("Answer to the mulplication problem is:"); document.write("<br>");
document.write("<br>")
document.write(f);
}

</script>
<input type="button" value="Addition" onclick="add(); return false;" > <br>
<br>
<input type="button" value="Multiplication" onclick="multiply(); return false;" >
</body>
</html>