Planned⎕C Case r←[x] ⎕C y
This primitive or feature is planned, that is, it doesn't appear in the most recent released implementation of TinyAPL. Details may change before it is added!
Category: Core
x must be one of the scalar integers 1, 0, ¯1, and defaults to 0. y must be a character array.
If x is 1, r is y with each character uppercased; if x is 0, r is y with each character case-folded (for caseless comparison); if x is ¯1, r is y with each character lowercased.