Arcade question: Round() function

[WingCheung1]

Hello,

I wrote a very simple expression and used the Round function. The output of the Round function  (i.e. 3.14) is correct, but when I multiply that output by a constant of 10, it is giving me the answer of 31.400000000000002 instead of 31.4. Is there a simple explanation for this? Did I miss something? Thanks!

[DanPatterson · Accepted solution]

It is called "floating point representation" an historic issue well covered.

you might want to round the multiplied value as well.

Python example, which you can emulate in arcade with concatenation

"{} vs {}".format(round(math.pi, 2), round(math.pi * 10, 1))
'3.14 vs 31.4'

, 

[WingCheung1]

Thank you for the quick reply, Dan!