[issue39648] Update math.gcd() to accept "n" arguments.

[Bernardo Sulzbach]

Bernardo Sulzbach <bernardo at bernardosulzbach.com> added the comment:

I think this might make sense because gcd() could have some optimizations for n > 2, such as sorting the numbers and starting by the smallest elements.

However, I don't think gcd() and lcm() with more than two arguments are frequent use cases.

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nosy: +BernardoSulzbach

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<https://bugs.python.org/issue39648>
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