Go by Example

Go is an open source programming language designed for building simple, fast, and reliable software. Please read the official documentation to learn a bit about Go code, tools packages, and modules.

Go by Example is a hands-on introduction to Go using annotated example programs.

• Hello World
• Values
• Variables
• Constants
• For
• If/Else
• Switch
• Arrays
• Slices
• Maps
• Range
• Functions
• Multiple Return Values
• Variadic Functions
• Closures
• Recursion
• Pointers
• Strings and Runes
• Structs
• Methods
• Interfaces
• Struct Embedding
• Generics
• Errors
• Goroutines
• Channels
• Channel Buffering
• Channel Synchronization
• Channel Directions
• Select
• Timeouts
• Non-Blocking Channel Operations
• Closing Channels
• Range over Channels
• Timers
• Tickers
• Worker Pools
• WaitGroups
• Rate Limiting
• Atomic Counters
• Mutexes
• Stateful Goroutines
• Sorting
• Sorting by Functions
• Panic
• Defer
• Recover
• String Functions
• String Formatting
• Text Templates
• Regular Expressions
• JSON
• XML
• Time
• Epoch
• Time Formatting / Parsing
• Random Numbers
• Number Parsing
• URL Parsing
• SHA256 Hashes
• Base64 Encoding
• Reading Files
• Writing Files
• Line Filters
• File Paths
• Directories
• Temporary Files and Directories
• Embed Directive
• Testing and Benchmarking
• Command-Line Arguments
• Command-Line Flags
• Command-Line Subcommands
• Environment Variables
• HTTP Clients
• HTTP Servers
• Context
• Spawning Processes
• Exec'ing Processes
• Signals
• Exit