urbit/pub/docs/dev/hoon/runes/wt/wtzp.md

wutzap, ?!, %wtzp

NOT

?! is a synthetic rune that produces the logical "not" of p.

Produces

Twig: [%wtzp p=twig]

Sample

p is a twig.

Tall form

?!  p

Wide form

?!(p)

Irregular form

!p

Examples

~zod/try=> !&
%.n
~zod/try=> !|
%.y
~zod/try=> (gth 5 6)
%.n
~zod/try=> !(gth 5 6)
%.y
~zod/try=> !1
! type-fail
! exit