Problem Statement

Create a variable with a user-defined name. The variable name should not be written in the program text, but should be taken from the user dynamically.

Let's start with the solution:

      is←{ t←⍵ ⋄ ⎕this⍎⍺,'←t' } ⍝⍝ the 'Slick Willie' function ;)
      'test' is ⍳2 3
      test
 1 1  1 2  1 3 
 2 1  2 2  2 3