round ( x -- y )
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Vocabulary
math.functions

Inputs

x

a real

Outputs

y	a whole real number

Word description
Outputs the whole number closest to x, rounding out at half.

Notes
The result is not necessarily an integer.

Examples

USING: math.functions prettyprint ; 4.5 round .
5.0

USING: math.functions prettyprint ; 4.4 round .
4.0

Definition

IN: math.functions

GENERIC: round ( x -- y )

Methods

USING: kernel math math.functions ;

M: float round dup sgn 2 /f + truncate ;


USING: math math.functions ;

M: integer round ; inline


USING: math math.functions ;

M: ratio round [ >= ] (ratio-round) ;