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Update primelib.py #10208

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e6a1a34
Update primelib.py
rtang09 Oct 10, 2023
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[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Oct 10, 2023
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15 changes: 14 additions & 1 deletion maths/primelib.py
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Original file line number Diff line number Diff line change
Expand Up @@ -38,14 +38,23 @@
"""

from math import sqrt

import doctest
from maths.greatest_common_divisor import gcd_by_iterative


def is_prime(number: int) -> bool:
"""
input: positive integer 'number'
returns true if 'number' is prime otherwise false.

>>> is_prime(97)
True
>>> is_prime(9991)
False
>>> is_prime(-3)
Traceback (most recent call last):
...
AssertionError: 'number' must been an int and positive
"""

# precondition
Expand Down Expand Up @@ -589,3 +598,7 @@ def fib(n):
fib1 = tmp

return ans


if __name__ == "__main__":
doctest.testmod()