Round to 2 decimal places
Steve D'Aprano
steve+python at pearwood.info
Wed Dec 6 21:43:06 EST 2017
On Thu, 7 Dec 2017 11:58 am, nick martinez wrote:
> I'm stuck. I need my program to round the end solution to 2 decimal places
> but cant figure it out. Can someone help? I've been trying between printf
> and round() but cant seem to get either to work.
It might help if you show exactly what values you have tried. This works for
me:
py> volume = 1.23456789
py> print(volume )
1.23456789
py> print(round(volume , 2))
1.23
The rest of your code is interesting but irrelevant to your question. If you
want to learn how to round to 2 decimal places, the actual calculation of
surface area and volume aren't necessary. The only really important part is
this line:
> print("A cone with radius", r, "\nand height of", h, "\nhas a volume of :
> ", volume, "\nand surface area of : ", surfacearea,)
and even that can be cut down to just:
volume = 2345.987654321 # for example
print(volume)
We can round the result first, then print it:
print(round(volume, 2))
or we can change the display by using string formatting:
print("%.2f" % volume)
print("{:.2f}".format(volume))
--
Steve
“Cheer up,” they said, “things could be worse.” So I cheered up, and sure
enough, things got worse.
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