[Tutor] Calculate 4**9 without using **

[Alan Gauld]

On 06/03/17 19:03, Sri Kavi wrote:
> Wow, this works like a charm!
> def power(base, exponent):
>     """ Returns base**exponent. """
>     result = 1
>     for _ in range(abs(exponent)):
>         result *= base
>     if exponent < 0:
>         return 1 / result
>     return result

And just to add to the mix, here's a functional (as in FP)
version:

from functools import reduce
def power(base,exponent):
    result = reduce(lambda a,b: a*b, [1] + [base]*abs(exponent))
    return result if exponent >= 0 else 1/result

It basically does the same as the previous version
but moves the loop into the reduce function.

All to produce an inferior version of a builtin!
what fun  :-)

-- 
Alan G
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