Install & Tools: Swift toolchain, REPL, swiftc, Editors
Install the Swift toolchain, try the interactive REPL, compile with swiftc, and pick an editor (VS Code or Xcode).
Install & Tools: Swift toolchain, REPL, swiftc, Editors is a free Swift Academy lesson on CoddyKit. This is lesson 2 of 3. Any 3 lessons of this learning path are free to read in full — after that, CoddyKit PRO unlocks every lesson, plus hands-on practice with a built-in code editor and a 24/7 AI tutor. It is part of the Swift Academy learning path, and your progress syncs across the web and the CoddyKit app. The Swift Academy course includes 3 lessons in total.
What you will set up
Goal: Get Swift running. You will install the toolchain, try the REPL, compile with swiftc, and choose an editor.
Toolchain parts
The Swift toolchain provides:
- swift: REPL and script runner
- swiftc: native compiler
- Standard Library + core tools
REPL basics
The REPL lets you try code quickly. It is great for learning APIs and testing tiny snippets without files.
- Instant feedback
- No project setup
swiftc in a nutshell
swiftc compiles Swift files to native executables.
- Compile simple programs easily.
- Great for command-line tools and learning builds.
Editors: Xcode vs VS Code
Pick an editor:
- Xcode: full IDE, build & debug on macOS.
- VS Code: lightweight editor; add Swift extensions for syntax and tools.
Code demo
Try a small program you can run via REPL snippets or compile with swiftc.
// A tiny program you can compile with swiftc or run in the REPL as snippets
print("Swift tools demo")
// Simple values to observe in outputs
let versionHint = "Use swift --version to check toolchain"
let sum = 2 + 3 // basic arithmetic
// Interpolation keeps messages readable
print("\(versionHint); sum=\(sum)")
Interactive tool
Quick check: Which tool gives you an interactive prompt?
Recap
Recap: Install the toolchain, use swift for REPL, compile with swiftc, and pick an editor that fits your workflow.
Learn Swift with an AI tutor — free
Write and run real code in your browser, get instant help from a 24/7 AI tutor, and pick up where you left off on the web or in the app.
- Courses
- 122
- Lessons
- 409
Frequently Asked Questions
Is the “Install & Tools: Swift toolchain, REPL, swiftc, Editors” lesson free?
Yes — any 3 lessons of the Swift Academy learning path, including “Install & Tools: Swift toolchain, REPL, swiftc, Editors”, are free to read in full here on the web. After that, CoddyKit PRO unlocks every lesson, plus interactive practice with a built-in code editor and a 24/7 AI tutor. The Swift Academy course includes 3 lessons in total.
What will I learn in “Install & Tools: Swift toolchain, REPL, swiftc, Editors”?
Install the Swift toolchain, try the interactive REPL, compile with swiftc, and pick an editor (VS Code or Xcode). You practise Swift Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Swift Academy?
No prior experience is required. Swift Academy on CoddyKit is structured for beginners through advanced learners, so you can start here or from the beginning and move at your own pace. This is lesson 2 of 3.
How long does the “Install & Tools: Swift toolchain, REPL, swiftc, Editors” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Swift Academy lesson?
Yes. Every Swift Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- What is Swift? Safety, Performance, Readability
- Install & Tools: Swift toolchain, REPL, swiftc, Editors
- First Program & Build/Run (REPL vs swiftc, scripts)