How do I get a whole number as a result for a cube root?

Question

I am creating a problem which requires me to find the cube root of certain numbers, some of them have whole number roots, but a lot of them don\'t.

I have numbers li

Answer 1

It's more straightforward to avoid the problem! For example:

mx = 12000                   # maximum for cubes
crmx = int(mx**(1/3)) + 1    # largest test integer

result = max([n for n in range(crmx) if n**3 < mx])

# result = 22

Floating point arithmetic is always approximate. For example:

.99999999999999999.is_integer() gives True

.9999999999999999.is_integer() gives False

(Your interpreter's mileage may differ.)