// A TERMINAL TOOL FOR LEARNING SWIFT

Fix broken Swift, one file at a time.

94 small exercises that fail on purpose. Open one in your editor, fix it, save — swiftlings recompiles and tells you the moment it passes.

install

$ brew install swiftlings && swiftlings init

macOS & Linux · requires Swift 5.9+

swiftlings — watch

swiftlings

loops1 · 01_control_flow ██████████████░░░░░░░░░░░░░░░░ 42/94 45%

exercise

Exercises/01_control_flow/loops1.swift

// Use a for-in loop to iterate over the range and print each number

output · ✓ pass

✓ compiled ✓ ran 0.6s

1 2 3 4 5

✓ Exercise done — press n for the next exercise

n next h hint l list c check all x reset q quit

watch

Save. It just re-runs.

No commands to remember mid-session. Swiftlings watches the file, recompiles on save, and shows pass or fail instantly.

curriculum

94 exercises, 19 topics.

From basics to concurrency, generics, and Codable — each category ships with a README and links to the official docs.

stuck?

Hints on one keypress.

Press h for a hint, l for the full exercise list, x to reset and try again. Progress survives restarts.