Topic: APLX Help : Help on APL language : System Functions & Variables : ⎕A Alphabet, Upper Case
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⎕A Alphabet, Upper Case

The niladic system function ⎕A returns a result which is a 26 character vector of the letters in the alphabet in upper case only.

             ⎕A
       ABCDEFGHIJKLMNOPQRSTUVWXYZ
             ⎕A⍳'APL'
       1 16 12
Topic: APLX Help : Help on APL language : System Functions & Variables : ⎕A Alphabet, Upper Case
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