#lang plait
(define (safe-div num den)
(if (zero? den)
(none)
(some (/ num den))))
(test (safe-div 42 0) (none))
(test (safe-div 42 12) (some 7/2))
#lang plait
(define (safe-div num den)
(if (zero? den)
(none)
(some (/ num den))))
(test (safe-div 42 0) (none))
(test (safe-div 42 12) (some 7/2))