Re: "Back & Forth" - Local variables

albert@spenarnc.xs4all.nl wrote:

i. {} --> 1 2 3 4

No what is that supposed to mean?
 

Ok, for the record then, Toad test and demo aids:

1) { ... }
   Set a marker and compile the code within the braces.

2) {}
   Executes the code compiled by { ... } but doesn't perform the marker,
   therefore {} can execute the code multiple times if so desired.

   The marker can be performed manually by performing {FIN} .
   {FIN} is found in other words such as E or RUN1 (they the same)
   which follow { ... } to do a one-time execution of the marked code.

   Other words execute the code multiple times in a loop and performs
   {FIN} when done:
    i. RUN
       Loops the code until TRUE is returned
    i. RUNS
       Loops the code n times
    i. GRUN
       Performs RUN and drops g-string that remained on stack
    i. FORALL
       Perform {} on all (counted) strings on the data stack
3) i.
   Print " --> " .
   It serves as a list item mark and also prints an arrow to indicate
   the output of the words that follow.
  
Summary:

i. { ... } E        \ run once
i. { ... } RUN1     \ ditto, run once
i. { ... } n RUNS   \ run n times
i. { ... } RUN      \ run while returned flag is TRUE
i. { ... } GRUN     \ perform RUN and drop a remaining g-string
i. { ... } FORALL   \ perform {} on each (counted) string on the data stack

Note: g-string is a generic string; it is referenced by address and
      count on the data stack (standard Forth strings are g-strings)

--
me