Exclamation Mark (!)

! 𝕩: Assert

Throw an error if 𝕩 is not 1.

   ! 1
1
   ! 2
Error: Assertion error
at ! 2
   ^
   ! "hello"
Error: hello
at ! "hello"

𝕨 ! 𝕩: Dyad

Throw an error with message 𝕨 if 𝕩 is not 1.

   "hi" ! 1
1
   "two" ! 2
Error: two
at "two" ! 2
         ^
   "hello error" ! "hello"
Error: hello error
at "hello error" ! "hello"