package main

import "fmt"

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

package main

import "fmt"

func main() {
	var a int = 10
	var b int = 20
	fmt.Println(a + b)
}

package main

import "fmt"

func main() {
	arr := []int{1, 2, 3, 4, 5}
	for _, v := range arr {
		fmt.Println(v)
	}
}

package main

import (
	"fmt"
	"sync"
)

var wg sync.WaitGroup

func worker() {
	fmt.Println("Worker function executed")
	wg.Done()
}

func main() {
	wg.Add(1)
	go worker()
	wg.Wait()
}

package main

import "fmt"

type Employee struct {
	Name string
	Age  int
}

func main() {
	emp := Employee{Name: "John", Age: 30}
	fmt.Println(emp)
}

package main

import (
	"fmt"
	"sync"
	"time"
)

func worker(id int, wg *sync.WaitGroup) {
	defer wg.Done()
	time.Sleep(time.Second)
	fmt.Printf("Worker %d done\n", id)
}

func main() {
	var wg sync.WaitGroup
	for i := 1; i <= 5; i++ {
		wg.Add(1)
		go worker(i, &wg)
	}
	wg.Wait()
}