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all-algorithms-python/maths/ceil.py at Write-for-current-Python · UnixJunkie/all-algorithms-python · GitHub

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"""

https://en.wikipedia.org/wiki/Floor_and_ceiling_functions

"""

def ceil(x) -> 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()