Divide with Javascript

Question

I know that this has to be the simplest thing of all time, but I'm a beginner here. Why do I get a syntax error when I run

<script type="text/javascript" language="JavaScript">
document.write(10 / 2 + "<br />"); //Divide 10 by 5 to get 2
</script>

I know that "/" is the division symbol, but for some weird reason it keeps throwing off Dreamweaver

What do you mean by "it keeps throwing off Dreamweaver"? This is valid syntax as far as I can tell. — jches
– jches, Commented Jun 6, 2013 at 15:06
Try document.write((10 / 2).toString(10) + "<br />");. If that works, we can say there's a bug in Dreamweaver... Actually it seems to have a bug already : ). — Teemu
– Teemu, Commented Jun 6, 2013 at 15:11

Chris G. · Accepted Answer · 2013-06-06 15:06:02Z

4

document.write( (10/2) + '<br>');

answered Jun 6, 2013 at 15:06

Chris G.

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4 Comments

katiejallred Over a year ago

I did that but it's still giving me a syntax error in Dreamweaver

Chris G. Over a year ago

Stop using dreamweaver, then.

Chris G. Over a year ago

Either syntax is valid, honestly. Your IDE just sucks. If you create a brand new empty page in Dreamweaver and add that text to it, do you still get a syntax error?

MasNotsram Over a year ago

As Chris says, even your original syntax is fine as is. This is better for clarifying to the human reader when writing the code, but both when interpreted give the same output. Dreamweaver is at fault here.

Mirko Cianfarani · Accepted Answer · 2013-06-06 15:05:40Z

2

<script type="text/javascript" language="JavaScript">
//is better that add a variable
var p=10/5;
document.write(p + "<br />"); //Divide 10 by 5 to get 2
//or document.write(float(10/5) + "<br />"); //Divide 10 by 5 to get 2
</script>

answered Jun 6, 2013 at 15:05

Mirko Cianfarani

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2 Comments

katiejallred Over a year ago

To declare another variable, like say I wanted to also do an addition problem would I 'var a=10+5; document.write(a + "<br />");'

Mirko Cianfarani Over a year ago

You can declare one time and replace with new value. Or using the variable's array. Example: var mycars = new Array(); mycars[0] = "Saab"; mycars[1] = "Volvo"; mycars[2] = "BMW";

Teemu · Accepted Answer · 2013-06-06 15:20:33Z

0

Looks like Dreamweaver can't do automatic type casting when concatenating numbers to strings. Hence you need to do the type coercion yourself:

document.write((10 / 2).toString(10) + "<br />");

answered Jun 6, 2013 at 15:20

Teemu

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3 Comments

Mirko Cianfarani Over a year ago

explain that serves ´.toString(10)´ please (excuse)

Teemu Over a year ago

With Number.toString() method you can change a Number to String. 10 is a base you want to use in the result. For example 5.toString(2) gives you 101, which is 5 as binary.

Teemu Over a year ago

@MirkoCianfarani You're wellcome. If you didn't ask, you wouldn't know it now : ).

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