Python/maths/ceil.py
2022-10-12 20:41:52 +02:00

25 lines
485 B
Python

"""
https://en.wikipedia.org/wiki/Floor_and_ceiling_functions
"""
def ceil(x: float) -> int:
"""
Return the ceiling of x as an Integral.
:param x: the number
:return: the smallest integer >= x.
>>> import math
>>> all(ceil(n) == math.ceil(n) for n
... in (1, -1, 0, -0, 1.1, -1.1, 1.0, -1.0, 1_000_000_000))
True
"""
return int(x) if x - int(x) <= 0 else int(x) + 1
if __name__ == "__main__":
import doctest
doctest.testmod()