Code Playground

Collection of copy-paste ready Go code snippets

How to Use

  1. 1. Copy Code: Click the copy button on any code snippet
  2. 2. Run Locally: Paste into a .go file and run with go run filename.go
  3. 3. Experiment: Modify and explore the code
  4. 4. Learn: Check the tutorials for detailed explanations

Quick Reference Snippets

Hello World

Hello Worldgo
package main

import "fmt"

func main() {
    fmt.Println("Hello, Go!")
}

Read Command Line Arguments

Read Command Line Argumentsgo
package main

import (
    "fmt"
    "os"
)

func main() {
    if len(os.Args) > 1 {
        fmt.Println("Arguments:", os.Args[1:])
    }
}

Read from User Input

Read from User Inputgo
package main

import (
    "bufio"
    "fmt"
    "os"
)

func main() {
    reader := bufio.NewReader(os.Stdin)
    fmt.Print("Enter text: ")
    text, _ := reader.ReadString('\n')
    fmt.Println("You entered:", text)
}

Simple HTTP Server

Simple HTTP Servergo
package main

import (
    "fmt"
    "net/http"
)

func handler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello from %s!", r.URL.Path)
}

func main() {
    http.HandleFunc("/", handler)
    http.ListenAndServe(":8080", nil)
}

JSON Encoding

JSON Encodinggo
package main

import (
    "encoding/json"
    "fmt"
)

type Person struct {
    Name string `json:"name"`
    Age  int    `json:"age"`
}

func main() {
    p := Person{"Alice", 30}
    data, _ := json.Marshal(p)
    fmt.Println(string(data))
}

Goroutine Example

Goroutine Examplego
package main

import (
    "fmt"
    "time"
)

func printNumbers(name string) {
    for i := 1; i <= 3; i++ {
        fmt.Printf("%s: %d\n", name, i)
        time.Sleep(100 * time.Millisecond)
    }
}

func main() {
    go printNumbers("A")
    go printNumbers("B")
    time.Sleep(1 * time.Second)
}

Channel Communication

Channel Communicationgo
package main

import "fmt"

func main() {
    messages := make(chan string)
    
    go func() {
        messages <- "Hello"
        messages <- "World"
    }()
    
    msg1 := <-messages
    msg2 := <-messages
    fmt.Println(msg1, msg2)
}

File Writing

File Writinggo
package main

import (
    "fmt"
    "os"
)

func main() {
    data := []byte("Hello, Go!\n")
    err := os.WriteFile("output.txt", data, 0644)
    if err != nil {
        fmt.Println("Error:", err)
    }
    fmt.Println("File written successfully")
}

Next Steps

Once you're comfortable with these snippets, explore the full course for:

  • ✓In-depth tutorials with explanations
  • ✓Progressive exercises from beginner to advanced
  • ✓Real-world project implementations
  • ✓Video tutorials for visual learning
Explore Full Course →

Tip: Try combining these snippets to create more complex programs!