README.MD

Go Learning Examples

This directory contains various Go examples to help you learn the language step by step.

Examples Overview

1. Introduction

   • Introduction to Go
   • Installation & setup
   • Initialization & running a Go program

2. Constant, Variables, and Types

   • Basic data types
   • Variable declaration
   • Constants

3. Printing & formatting

   • Printing to console
   • Formatting strings

4. Arrays, Slices, and Maps

   • Fixed-length arrays
   • Dynamic slices
   • Key-value maps

5. Control Flow

   • If/else statements
   • Switch cases
   • Loops (for, range)
   • Control statements (break, continue)

6. Functions

   • Basic function syntax
   • Multiple return values
   • Variadic functions
   • Defer statements
   • Closures
   • Recursion
   • Anonymous functions

7. Error Handling

   • The error interface
   • Constructing basic errors
   • Expected (sentinel) errors
   • Custom error types
   • Error handling best practices
   • Panic and Recover

8. Structs

   • Basic function syntax
   • Custom Types

9. Methods and Interface

   • Methods
   • Interface

10. Packages and Modules

    • Package organization
    • Module management
    • Local/remote imports
    • Semantic versioning

11. Basic Miscellaneous

    • Type Casting
    • Type Inference
    • Type Assertions
    • Type Switches
    • Maps and Make
    • Pointers
    • Generics

12. Concurrency

    • Goroutines
    • Channels (Buffered and Unbuffered)
    • Select Statement
    • Synchronization (WaitGroup, Mutex)

13. File I/O and Working with JSON

    • File I/O
    • Working with JSON
    • JSON Marshalling and Unmarshalling
    • JSON Encoding and Decoding

14. Testing

    • Writing tests
    • Test Driven Development
    • Package testing
    • Table-driven tests

15. Command line interfaces

    • Basic CLI
    • Flags
    • Subcommands
    • Parsing arguments

16. Web Development

    • HTTP Server
      • basic server
      • multiplexing
      • multiple server configuration
    • HTTP Client
      • basic client
      • request and response
      • error handling

17. Database

    • SQLite
      • basic database
      • CRUD operations
      • error handling
      • advanced
        • Advanced
          • CRUD operations
          • Context
          • error handling
          • best practices
          • transactions
          • testing

How to Run Examples

1. Navigate to the specific example directory
2. Read the comments in the code for explanation
3. Run the program using:

   go run main.go

Tips for Beginners

• Take time to understand each concept before moving to the next
• Try to modify the examples to experiment with the code
• Use go doc command to read documentation
• Practice writing your own programs using learned concepts