Learn Go
learn-go · v0.1 · interactive course

A friendly path through the Go programming language.

22 chapters across 8 tracks. Every lesson has a runnable playground that compiles real Go on the official Go Playground. Your progress is saved locally — no signup.

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Track A

Foundations

Install Go, run your first program, understand packages.

CH 010/3
Getting Started
Install Go, write hello world, understand go run vs go build.
CH 020/2
Variables & Constants
var, const, the := short form, zero values, and iota.
CH 030/3
Basic Types
Numbers, booleans, strings, bytes, runes, and type conversion.
Track B

Control & Functions

Conditionals, loops, functions, closures, and defer.

CH 040/4
Control Flow
if/else, switch, the lone for loop, break, continue.
CH 050/4
Functions
Parameters, multiple returns, variadic, closures, and defer.
Track C

Data Structures

Arrays, slices, maps, strings, runes, and pointers.

CH 060/4
Arrays & Slices
Fixed-size arrays and the workhorse slice type.
CH 070/2
Maps
Key-value tables with the comma-ok idiom.
CH 080/2
Strings & Runes Deep Dive
UTF-8, ranging over strings, and the strings package.
CH 090/1
Pointers
Address-of (&), dereference (*), and pass semantics.
Track D

Types & Interfaces

Structs, methods, interfaces, and generics.

CH 100/2
Structs
Compose your own types from named fields.
CH 110/1
Methods
Attach behavior to types — value vs pointer receivers.
CH 120/3
Interfaces
Go's duck typing: implicitly satisfied contracts.
CH 130/2
Generics
Type parameters, constraints, and the comparable / any keywords.
Track E

Robustness

Errors, panic/recover, and tests.

CH 140/2
Error Handling
The error interface, wrapping with %w, errors.Is / errors.As.
CH 150/1
Panic & Recover
For truly exceptional situations only.
CH 160/2
Testing & Benchmarks
Built-in testing: go test, table tests, benchmarks, fuzzing.
Track F

Concurrency

Goroutines, channels, select, sync, and context.

CH 170/3
Goroutines
Lightweight concurrent functions started with the go keyword.
CH 180/3
Channels & select
Go's typed pipes — communicate, don't share memory.
CH 190/3
sync Package
Mutex, RWMutex, WaitGroup, Once, atomic, errgroup.
CH 200/1
Context
Cancellation, deadlines, and request-scoped values.
Track G

Standard Library

fmt, io, os, encoding/json, net/http, time.

CH 210/11
Standard Library Tour
fmt, io, os, bufio, encoding/json, net/http, time, slog, regexp, flag, embed.
Track H

Project & Deploy

Modules, tooling, and ship a small web server.

CH 220/3
Modules, Tooling & Deploy
go mod, go fmt/vet/doc, workspaces, build, and ship.

Open the first lesson. Take it at your own pace.

No signup, no cloud. Everything runs in your browser against the official Go Playground.

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