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floor
Combined from primary sources listed below.

In Cool§

See primary documentation in context for routine floor 

multi        floor(Numeric(Cool))
multi method floor

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

say "1.99".floor;       # OUTPUT: «1␤» 
say "-1.9".floor;       # OUTPUT: «-2␤» 
say 0.floor;            # OUTPUT: «0␤»

In Complex§

See primary documentation in context for method floor 

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

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

say (1.2-3.8i).floor;           # OUTPUT: «1-4i␤»

In role Real§

See primary documentation in context for method floor 

method floor(Real:D: --> Int:D)

Return the largest integer not greater than the number.

In role Rational§

See primary documentation in context for method floor 

method floor(Rational:D: --> Int:D)

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