What you'll learn in this Go variables tutorial

This interactive Go tutorial has 7 hands-on exercises. Estimated time: 15 minutes.

1. What is a variable — A variable is a labeled slot that holds a value — like a shelf slot labeled with a book title. Run this to see one in ac…
2. Create your own with := — `:=` creates a variable and gives it a value in one shot. Change the title to your favorite book and run it.
3. Declare first, assign later — `var title string` creates an empty slot. `title = "The Hobbit"` puts a book in it. Note: filling later uses `=`, not `:…
4. Update a variable — the aha 🤯 — Variables can change. `:=` creates, `=` updates. The count starts at 60. A shipment arrives — update it to 95 and print …
5. Two variables in one line — Go lets you declare multiple variables at once: `title, author := "The Hobbit", "Tolkien"`. Change the book and author t…
6. Zero values — What happens if you create a shelf slot but never put a book in? Go gives it a default called a zero value. Run this to …
7. Build a library profile — Use everything you learned: create `title` and `copies` with `:=`, declare `section` with `var` and assign it separately…

Go Variables concepts covered

• Storing information