Go Error Wrapping

Introduction

Add context to errors using fmt.Errorf and errors.Is / errors.As.

This tutorial explains the concepts and provides practical examples you can run yourself.

What You Will Learn

• Understand the core idea behind go error wrapping.
• See common usage patterns with clear examples.
• Avoid typical mistakes beginners make.

Basic Example

package main

import "fmt"

func main() {
    // Example code for Go Error Wrapping
    fmt.Println("Hello from Go Error Wrapping")
}

Key Concepts

Go emphasizes simplicity, clarity, and strong tooling. When working with go error wrapping, keep these principles in mind:

1. Explicit is better than implicit.
2. Composition is preferred over inheritance.
3. Errors are values, not exceptions.

Common Patterns

Here is a slightly more advanced example demonstrating a typical pattern:

package main

import "fmt"

func main() {
    result := example("Go")
    fmt.Println(result)
}

func example(name string) string {
    return "Learning " + name + " with Go Error Wrapping"
}

Try It Yourself

1. Modify the example to accept user input.
2. Experiment with different values and observe the output.
3. Write a small test for the function you created.

Summary

Go Error Wrapping is an essential building block in Go programming. Practice the examples, explore the Go standard library, and move on to the next tutorial when you are comfortable.