Tutorials

Learn

Starting Henceforth — a video series teaching FORTH and the Henceforth Bitcoin wallet from first principles. Watch an episode, then code along in the app.

What is Henceforth? — poster
Episode 1What is Henceforth?1:38 · Spring · Vivaldi · Allegro (RV 269 i)
The Stack — poster
Episode 2The Stack1:14 · Summer · Vivaldi · Presto (RV 315 iii)
Why the maths looks backwards — poster
Episode 3Why the maths looks backwards2:03 · Autumn · Vivaldi · Allegro (RV 293 i)
Words from words — poster
Episode 4Words from words1:53 · Winter · Vivaldi · Allegro (RV 297 i)
Moving numbers — poster
Episode 5Moving numbers1:35 · Bach · Brandenburg No. 3 · Allegro (BWV 1048 i)
Letters are numbers — poster
Episode 6Letters are numbers1:59 · Tchaikovsky · Trepak · Russian Dance (Nutcracker, Op. 71)

FORTH

Leo Brodie’s books

Two essential FORTH books — both freely available, both still the best way to learn the language and its style of thinking more than forty years on.

Starting FORTHLeo Brodie · 1981

The classic introduction to FORTH. Walks through the stack, defining words, and writing real programs — still the friendliest entry point to the language.

Read free online
Thinking FORTHLeo Brodie · 1984

A book on software craftsmanship using FORTH as the medium — decomposition, factoring, naming, and the discipline of writing small composable words. Re-released by Brodie under an open licence.

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