novaBBS - rec.puzzles - Count-Trailing-Zeros(x) ----- Can I use Log(x) to see if X is equal to ( Integer * 10 ^ k) ???

Count-Trailing-Zeros(x) ----- Can I use Log(x) to see if X is equal to ( Integer * 10 ^ k) ???

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Subject: Count-Trailing-Zeros(x) ----- Can I use Log(x) to see if X is equal
to ( Integer * 10 ^ k) ???
From: henha...@gmail.com (henh...@gmail.com)
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by: henh...@gmail.com - Sun, 18 Sep 2022 15:57 UTC

--------- (in Python) is there a simple string function that counts the leftmost 0's ???

Count how many zeros are at the end of your int:

def end_zeros(num):
s = str(num)
return len(s) - len(s.rstrip("0"))

print(end_zeros(10)) # == 1
print(end_zeros(101)) # == 0
print(end_zeros(245)) # == 0
print(end_zeros(100100)) # == 2

---------------- Writing a loop (using % and // ) feels like [reinventing the wheel] and seems intrinsically wrong. --- (it must be unPythonic)

i like this code (above) because it's not reinventing the wheel --- the Python implementors have already done the loop (using % and // ), so i'm just using that efficient tool (routine).

Subject	Author
Count-Trailing-Zeros(x) ----- Can I use Log(x) to see if X is equal	henh...@gmail.com

Don't kid yourself. Little is relevant, and nothing lasts forever.

interests / rec.puzzles / Count-Trailing-Zeros(x) ----- Can I use Log(x) to see if X is equal to ( Integer * 10 ^ k) ???