Listing 2. The screen output of the F-PC program shown at the listing 1.
The message about [] is displayed because [] is defined in the ASSEMBLER
vocabulary.

E:\TO-SEND>f arrays.seq ok

[] isn't unique
   70 \ The last, delimiting, subarray is needed for []len
   71 \ to calculate the length properly
   72 1  2  3  4  5   5 array,
   73 6  7  8  9      4 array,
   74 10 11 12        3 array,
   75                 0 array,
   76                           4 array, constant x
   77 0 0 x [] [] .  1
   78 2 0 x [] [] .  3
   79 0 2 x [] [] .  10
   80 1 2 x [] [] .  11
   81 25 1 2 x [] []!
   82 1 2 x [] [] .  25
   83 1 2 x [] []^ @ .  25
   84 0 x []len .  5
   85 1 x []len .  4
   86 2 x []len .  3
   87 x 3 .2array
      [
         [    1    2    3    4    5 ]
         [    6    7    8    9 ]
         [   10   25   12 ]
      ]
   88
   89 off> listvar