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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 ( x if isinstance(x, int) or x - int(x) == 0 else int(x + 1) if x > 0 else int(x) )
if __name__ == "__main__":
import doctest doctest.testmod()