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ceiling
Combined from primary sources listed below.

In role Real§

See primary documentation in context for method ceiling. 

method ceiling(Real:D: --> Int:D)

Returns the smallest integer not less than the number.

In role Rational§

See primary documentation in context for method ceiling. 

method ceiling(Rational:D: --> Int:D)

Return the smallest integer not less than the invocant. If denominator is zero, fails with X::Numeric::DivideByZero.

In Cool§

See primary documentation in context for routine ceiling. 

multi        ceiling(Numeric(Cool))
multi method ceiling

Coerces the invocant (or in sub form, its argument) to Numeric, and rounds it upwards to the nearest integer.

say "1".ceiling;        # OUTPUT: «1␤»
say "-0.9".ceiling;     # OUTPUT: «0␤»
say "42.1".ceiling;     # OUTPUT: «43␤»

In Complex§

See primary documentation in context for method ceiling. 

method ceiling(Complex:D: --> Complex:D)

Returns self.re.ceiling + self.im.ceiling. That is, each of the real and imaginary parts is rounded to the lowest integer not less than the value of that part.

say (1.2-3.8i).ceiling;         # OUTPUT: «2-3i␤»