JavaScript Forum

**hiptobesquare** · 09-15-2005, 06:15 PM

Hi.
i have an interesting project writing a script that can calculate the angles and lengths required when cutting frame for use on sliding wardrobe doors with angled top corners (to accomodate sloping ceilings). My question: I know that to work out the hypotenuse of a triangle i add both sides together squared- then find the square root of the resulting figure. My problem is finding the square root of a number using javascript. Has anyone ever seen such a function???

**0beron** · 09-15-2005, 06:17 PM

Code:

Math.sqrt(number)

**hiptobesquare** · 09-15-2005, 07:00 PM

Oh i didnt know that. i just figured this out though
[javascript]
var z = 100;

$i=0;
while (i * i != z ){
i++;
}
[/javascript]
it will only work if var z has a whole number for square route but all the numbers i wouldv been working with did have.

I think il use your way anyway Oberon it looks to others like i know more JS then.
Thanks for helping out on another of my simple problems

**hiptobesquare** · 09-15-2005, 07:08 PM

1000 posts. congratulations

**0beron** · 09-15-2005, 08:13 PM

Yeah I know

I made a celebratory post in the general forum...

I know next to no javascript, I just googled for 'javascript square root' and this came up. If you can raise numbers to powers you can get a square root by 'raising' something to the power of 0.5 also.

**delta** · 02-21-2007, 08:26 AM

How do u do power of a number in javascript
I am trying to do a script to calculate runway requirements and second of acceleration on a aircraft

like this
distance=1/2 * 8 (ft/sec) * t(secs)

How would u do that in javascript
Can some one HELP ME PLEASE
Thanks People

Quote:

Originally Posted by 0beron

Yeah I know

I made a celebratory post in the general forum...

I know next to no javascript, I just googled for 'javascript square root' and this came up. If you can raise numbers to powers you can get a square root by 'raising' something to the power of 0.5 also.

**willcode4beer** · 02-21-2007, 10:02 AM

Quote:

Originally Posted by delta

How do u do power of a number in javascript
I am trying to do a script to calculate runway requirements and second of acceleration on a aircraft

like this
distance=1/2 * 8 (ft/sec) * t(secs)

How would u do that in javascript
Can some one HELP ME PLEASE
Thanks People

Math.pow(number,power);

see:
http://www.w3schools.com/jsref/jsref_obj_math.asp

**delta** · 02-21-2007, 12:05 PM

This is my code and it is blank in IE6 and firefox !
Where am I going wrong here ?

<html><head><title>Math and javascript</title></head>
<Body>
<table><tr><td>
<script language=javascript>
for (x=0;x<45;x++)
document.write "table 1"
document.write x
</script>
</td>
<td>
<script language=javascript>
document.write "table 2"
document.write (.5*8*Math.pow(x,2)+"<br>")
</script>
</td></tr></table>
</body></html>

**willcode4beer** · 02-22-2007, 03:20 PM

Quote:

Originally Posted by delta

Where am I going wrong here ?

What is the objective?

**delta** · 02-23-2007, 06:14 PM

Quote:

Originally Posted by willcode4beer

What is the objective?

Thanks I was able to work it out willcode4beer !
The objective was to calculate (distance = 1/2* g * t ^2 )
Thanks willcode4beer
PS: This is a great site !