Go Tutorial

1. Go Introduction

What Go is, why Google built it, and why it has become the default language for cloud infrastructure.

2. Install Go

Install the Go toolchain, verify it, and run your first program with go run.

3. Go Syntax & Variables

Packages, the main function, variables, zero values, and Go's built-in types.

4. Functions & Multiple Returns

Declaring functions, multiple return values, named returns, and variadic parameters.

5. Structs & Interfaces

Structs, methods, pointer receivers, and how Go's implicit interfaces enable composition over inheritance.

6. Goroutines & Channels

Concurrency with goroutines, channels, select, and the sync package.

7. Error Handling

Go's explicit error values, wrapping errors, and panic/recover — and when (not) to use them.

8. Building a REST API with net/http

A practical JSON REST API using only the standard library, plus a look at where Gin fits in.

9. Advanced Concurrency Patterns

The worker pool pattern in full, context.Context for cancellation and timeouts, and collecting errors from concurrent work with errgroup.

10. Testing & Benchmarking

Idiomatic table-driven tests, writing benchmarks with go test -bench, and measuring test coverage with go test -cover.

11. Go Interview Questions

Commonly asked Go interview questions with clear, practical answers.