round-to-step ( x step -- y )
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Vocabulary
math.functions

Inputs

x	a real
step	a real

Outputs

y

a real

Word description
Outputs the number closest to x, rounded to a multiple of step.

Notes
The result is not necessarily an integer.

Examples

USING: math.functions prettyprint ; 1.23456 0.25 round-to-step .
1.25

USING: math.functions prettyprint ; 12345.6789 100 round-to-step .
12300.0

Definition

USING: kernel math ;

IN: math.functions

: round-to-step ( x step -- y )
    [ [ / round ] [ * ] bi ] unless-zero ;