Tour

A first view on the console and the command line. - TclForth changes the standard Forth command line just a little:

---

Strings need no space after the first "

ok> "Hello World"
({Hello World}) ok> . cr
Hello World
ok>

The command line evaluates immediate words.

ok> 7 0 do I . loop
0 1 2 3 4 5 6 ok>
ok>

Stack diagrams are enclosed in braces. The parameters are treated as local variables.

ok> : Star { -- } "*" . ;
ok> Star
* ok>

Here is a simple structure added by TclForth.

ok> : Stars { n -- } n times Star repeat ;
ok> 5 Stars
* * * * * ok
ok> : Grid { n m -- }  n times m Stars cr repeat
ok> 3 4 Grid
* * * *
* * * * 
* * * * 
ok>

Say, you prefer to print the grid without trailing spaces: simply redefine Star.

ok> : Star {} "*" ascii emit ;
ok> 3 4 Grid
****
****
****

Tcl replaces code in a loaded word. The change is active also for all dependent words. - You can change a running TclForth program.

TclForth makes good use of the variable substitutions in Tcl.

ok> 33 variable V
ok> "The value of V is $V" . cr
The value of V is 33
ok>

Work on the GUI: Add a command to the help menu.

ok> : SayHello {} "Hello TclForth!" . cr ;
ok> "Hello!" {SayHello} hMenu addcommand

And try it.

Enjoy exploring TclForth!