interval- ( i1 i2 -- i3 )
Factor handbook » The language » Numbers » Intervals » Interval arithmetic

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Vocabulary
math.intervals

Inputs

i1	an interval
i2	an interval

Outputs

i3	an interval

Word description
Subtracts i2 from i1.

The output interval contains all possible values from subtracting any number in i2 from any number in i1.

Examples

USING: math.intervals prettyprint ; 10 11 [a,b] 5 7 [a,b] interval- .
T{ interval { from { 3 t } } { to { 6 t } } }

Definition

USING: math ;

IN: math.intervals

: interval- ( i1 i2 -- i3 )
    [ [ - ] interval-op nan-ok ] do-empty-interval ;