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[dcromley]

Gosh, is FORTH still around!?

I got into FORTH on the Radio Shack COCO computer.  The 6809 was a good CPU for FORTH.
I am even on the internet! (pg 25)  http://www.forth.org/fd/FD-V04N6.pdf

As always, somebody does a good job in Wikipedia:  https://en.wikipedia.org/wiki/Forth_(pro..._language)

Here is a code sample from page 180:

Exercize 2.15: Suppose the variables TEMP and HEATER-SWITCH have been declared
as part of an industrial simulation. TEMP holds a simulated temperature and
HEATERSWITCH holds a value that indicates whether a simulated heater is on or off.
Code a word STC (``simulate temperature change'') which has the following spec.

If the value held in HEATER-SWITCH is non zero, add 2 to the value held in TEMP,
otherwise subtract 1 from the value held in TEMP.

Solution 2.15:

Code: (Select All)

: STC \ -
  HEATER-SWITCH @
  IF  2  ELSE  -1  THEN
  TEMP +!
;