Walkthrough: first frames

Glossary for this site:

• Playground — free editor at Playground; no grading.
• Kata — graded exercise (prompt + Check) at Katas.
• Walkthrough — tutorial prose with the same live editor and optional Check (this page).

1. Run a frame

The fence below is pure FPL, wired to the hello-frames kata. Edit if you like, press play to run, or the check mark to grade against expected stdout.

;;; ── frames ──
1 | 1 2 3 + ; 2 3 4
1 2 3 + ; [1‿2‿3 +]
2 | 3 + ; 5
1 | 1 2 3 [-] swap-args ; 1 2 3 - 1

2. Open the playground

Anything you want to try without a prompt belongs in the Playground. Share with the #c= hash.

3. Grade the same kata on its page

Open Hello frames, press Check. Same starter, same expected file under learn/kata/hello-frames/.