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Swift Academy · Lesson

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 — lesson 2 of 3. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Swift Academy learning path, one of 3 lessons in the course, and your progress syncs across the web and the CoddyKit app.

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.

Frequently asked questions

Is the “Install & Tools: Swift toolchain, REPL, swiftc, Editors” lesson free?

Yes — the full text of “Install & Tools: Swift toolchain, REPL, swiftc, Editors” is free to read here on the web, and the Swift Academy course includes 3 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Swift Academy course, upgrade to CoddyKit PRO.

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; this is — lesson 2 of 3, so you can start here or from the beginning and move at your own pace.

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

  1. What is Swift? Safety, Performance, Readability
  2. Install & Tools: Swift toolchain, REPL, swiftc, Editors
  3. First Program & Build/Run (REPL vs swiftc, scripts)
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