Steven D'Aprano <[email protected]> added the comment:
Uses for lcm are common enough that it is provided by Excel and the C++ boost.
You can use it for working out problems like:
- if event A happens every 14 days, and event B happens every 6 days, then A
and B will occur together even lcm(14, 6) days.
By the way, the "trivial" implementation given in the Stackoverflow link has a
bug: if both arguments are zero, it raises instead of returning zero.
I wish that gcd took an arbitrary number of arguments, I often need to find the
gcd of three or more numbers, and this is a pain:
gcd(a, gcd(b, gcd(c, gcd(d, e)))))
when I could just say gcd(a, b, c, d, e) and have it work. Likewise of lcm.
(For that matter, the gcd of a single number a is just a.)
----------
nosy: +steven.daprano
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