System Function UCS

Monadic Function

Z←⎕UCS R Universal Character Set.     R should be a character string OR set of integers to enumerate.

R is  1) a character scalar or character String OR   2) scalar integer or set of Integers     to enumerate.

Z is a scalar or vector of results(integer or string, inverse of call.

Examples, working with ⎕UCS:

        ⎕UCS 'ABC'        ⍝Type 1(CHAR string) - Locate index positions for letters A, B and C in the Universal Character Set.
65 66 67                  ⍝Letters A, B and C FOUND at index positions 65, 66 and 67 in ⎕UCS.
        ⍴⎕UCS 'ABC'       ⍝Determine the shape of the result of the call to UCS.
3

        ⎕AV⍳'ABC'         ⍝Comparable call to ⎕AV using Iota, but the same letters('ABC').
66 67 68                  ⍝>> 66 67 68 << using ⎕AV versus >> 65 66 67 << using ⎕UCS - similar, but NOT identical results.

        ⎕UCS 65 66 67 68 69   ⍝Type 2(INTEGERS vector) - Find characters associated with integer positions in Universal Character Set.
ABCDE                     ⍝Letters A, B, C, D and E 'ABCDE' returned, as a string.
        ⍴⎕UCS 65 66 67 68 69  ⍝Determine the shape of the result.
5

        ⎕UCS "012345⍴⍳6789"   ⍝Another character string - with digits, rho(⍴) and iota(⍳) - also enumerated.
48 49 50 51 52 53 9076 9075 54 55 56 57      ⍝Note how Rho and Iota are much higher in the UCS than letters and digit-characters.

See also: ⎕AV

System Variables (A value may be assigned to these except for ⎕DM)
⎕ALX	⎕CT	⎕DM	⎕DT	⎕ELX	⎕FC	⎕FEATURE	⎕FPC	⎕IC	⎕IO
⎕LR	⎕LX	⎕PP	⎕PR	⎕PW	⎕RL	⎕SA	⎕WSID
Niladic System Functions (a value cannot be assigned to these)
⎕A	⎕AV	⎕EM	⎕ET	⎕LC	⎕NNAMES	⎕NNUMS	⎕SI	⎕SYSID	⎕SYSVER
⎕T	⎕TC	⎕TCBEL	⎕TCBS	⎕TCESC	⎕TCFF	⎕TCHT	⎕TCLF	⎕TCNL	⎕TCNUL
⎕TS	⎕WA
Monadic or dyadic system functions (a value cannot be assigned to these)
⎕AT	⎕CR	⎕DC	⎕DFT	⎕DL	⎕DR	⎕EA	⎕EC	⎕ERROR	⎕ES
⎕EX	⎕FMT	⎕FX	⎕MF	⎕NAPPEND	⎕NC	⎕NCREATE	⎕NERASE	⎕NINFO	⎕NL
⎕NLOCK	⎕NREAD	⎕NRENAME	⎕NREPLACE	⎕NRESIZE	⎕NSIZE	⎕NTIE	⎕NUNTIE	⎕STOP	⎕TF
⎕TRACE	⎕UCS	⎕VR
Note that quad functions and variables (except for the ⎕A family of functions) are case insensitive