Go Online Editor

Let's start with the basics:

package main

import "fmt"

func main() {
    // Print a message
    fmt.Println("Hello, World!")

    // Define variables
    var name string = "Go"
    age := 14 // Type inference

    // Basic types
    var (
        integer int = 42
        boolean bool = true
        text string = "Go is fun"
    )
}

Our editor provides real-time compilation and execution feedback.

Examples of working with slices and maps:

// Slices
numbers := []int{1, 2, 3}
numbers = append(numbers, 4)

// Create slice with make
slice := make([]int, 0, 10)

// Maps
person := map[string]string{
    "name": "John",
    "role": "Developer",
}

// Access and modify map
fmt.Println(person["name"])
person["role"] = "Senior Developer"

Practice these data structures in our editor.

Learn Go's powerful concurrency features:

package main

import (
    "fmt"
    "sync"
)

func main() {
    // Channels
    ch := make(chan int)
    go func() {
        ch <- 42 // Send
    }()
    value := <-ch // Receive

    // WaitGroup
    var wg sync.WaitGroup
    wg.Add(1)
    go func() {
        defer wg.Done()
        fmt.Println("Goroutine running")
    }()
    wg.Wait()
}

Test concurrent code safely in our environment.

Explore error handling patterns:

package main

import (
    "errors"
    "fmt"
)

// Function returning error
func divide(a, b float64) (float64, error) {
    if b == 0 {
        return 0, errors.New("division by zero")
    }
    return a/b, nil
}

// Custom error type
type ValidationError struct {
    Field string
    Message string
}

func (e *ValidationError) Error() string {
    return fmt.Sprintf("%s: %s", e.Field, e.Message)
}

Practice error handling patterns with immediate feedback.

Understanding Go interfaces:

package main

import "math"

// Define interface
type Shape interface {
    Area() float64
}

// Implement interface
type Circle struct {
    Radius float64
}

func (c Circle) Area() float64 {
    return math.Pi * c.Radius * c.Radius
}

func main() {
    var s Shape = Circle{Radius: 5}
    fmt.Printf("Area: %.2f\n", s.Area())
}

Test interface implementations in our editor.

Learn Go testing patterns:

// math_test.go
package math

import "testing"

func TestAdd(t *testing.T) {
    tests := []struct {
        name string
        a, b int
        want int
    }{
        {"positive", 2, 3, 5},
        {"negative", -2, -3, -5},
        {"zero", 0, 0, 0},
    }

    for _, tt := range tests {
        t.Run(tt.name, func(t *testing.T) {
            got := Add(tt.a, tt.b)
            if got != tt.want {
                t.Errorf("Add() = %v, want %v", got, tt.want)
            }
        })
    }
}

Practice testing with our built-in test runner.

Explore these official resources and learning materials:

Official Documentation:

• Go Programming Language - Official Go homepage
• Go Documentation - Complete Go documentation
• Go Language Specification - Language specification
• Go Standard Library - Built-in packages reference

Learning Resources:

• A Tour of Go - Interactive introduction to Go
• Go by Example - Hands-on examples
• Effective Go - Writing idiomatic Go
• Go Code Review Comments - Style guide

Community & Advanced:

• Go Blog - Official Go team blog
• Awesome Go - Curated Go resources
• Go Modules - Dependency management
• Go Concurrency Patterns - Goroutines and channels

These resources cover Go from basics to advanced concurrent programming!