Round float to decimal places?

Monkey Forums/Monkey Programming/Round float to decimal places?

wmaass

(Posted 2011) [#1]

I found a function for BMax that worked well for me.

Function Round:Float(N:Float, DecimalPlaces:Int)
	Return Float(N * 10.0^DecimalPlaces) / 10.0^DecimalPlaces
End Function

I need something like this for Monkey. Tried this:

Function Round:Float(N:Float, DecimalPlaces:Int)
	Return Float(N * Pow(10.0,DecimalPlaces)) / Pow(10.0,DecimalPlaces)
End Function

But it just gives me an Int. Anyone have an idea?

muddy_shoes

(Posted 2011) [#2]

I'm not sure why you're getting an Int from your function as it returns a Float for me, but aren't you missing a cast to Int in order to truncate the value?

Function Round:Float(N:Float, DecimalPlaces:Int)
	Return Float(Int(N * Pow(10.0,DecimalPlaces))) / Pow(10.0,DecimalPlaces)
End Function

wmaass

(Posted 2011) [#3]

Ah, you are right, I was getting a float. That wasn't the problem but your version works like a charm. Thanks muddy.

muddy_shoes

(Posted 2011) [#4]

No problem. If you're using this function a lot then you might want to test whether using Floor instead of the Int cast is faster on your target platform.

wmaass

(Posted 2011) [#5]

I will check that for sure. I'm calling this function a lot.