← Starting Henceforth
Episode 1
What is Henceforth?
A calculator you can teach — that also writes Bitcoin.
1:38 · Vivaldi · Allegro (RV 269 i)
Watch here · code in the app
Henceforth is the real terminal — one purchase ($9.99) for iPhone, iPad and Mac. Type the commands below into the app as you watch.
Code along
Tap to copy, then type it into Henceforth.
What you’ll learn
- ✓ FORTH is a calculator you talk to in postfix: 2 3 + .
- ✓ You can teach it new words — : double 2 * ; — then reuse them.
- ✓ The same machine writes Bitcoin Script, and a payment reads like a sentence.
Transcript
- so — what IS this thing?
- watch. it answers by doing.
- give it two numbers… and +.
- it added them. it's a calculator.
- but here's the good part —
- i just taught it a word.
- double means times two.
- see that? it knows double now.
- words you make. that's the idea.
- now… the other half.
- same prompt. watch closely.
- these are bitcoin words.
- that's the shape of a coin-lock.
- same machine. just more words.
- one last word — read it slow.
- pay rent: send 1000 there.
- it reads like a sentence.
- and it's also a payment.
- that's henceforth.
- one prompt. you teach it. let's go.