round-to-decimal ( x n -- y )

Vocabulary

math.extras

Inputs

x	a real
n	an integer

Outputs

y

a real

Word description

Outputs the number closest to x, rounded to n decimal places.

Notes

The result is not necessarily an integer.

Examples

USING: math.extras prettyprint ; 1.23456 2 round-to-decimal .
1.23

USING: math.extras prettyprint ; 12345.6789 -3 round-to-decimal .
12000.0

Definition

USING: kernel math math.functions ;

IN: math.extras

: round-to-decimal ( x n -- y ) 10^ [ * round ] [ / ] bi ;