package main
 
import string">"fmt"
 
func main() {
    string">"comment">// This is a comment
    fmt.Println(string">"Hello, World!")
}
 

package main
 
import (
    string">"fmt"
    string">"time"
)
 
string">"comment">// Person represents a human being
type Person struct {
    Name     string
    Age      int
    Birthday time.Time
}
 
func (p *Person) Greet() string {
    return fmt.Sprintf(string">"Hello, my name is %s and I am %d years old.", p.Name, p.Age)
}
 
func NewPerson(name string, age int) *Person {
    return &Person{
        Name: name,
        Age:  age,
    }
}
 
func main() {
    person := NewPerson(string">"John Doe", 30)
    fmt.Println(person.Greet())
    
    string">"comment">// Numbers demonstration
    const pi = 3.14159
    var count int64 = 42
    
    string">"comment">// Boolean values
    var isGolangFun bool = true
    
    if isGolangFun {
        fmt.Println(string">"Learning Go is fun!")
    }
}
 

package main
 
import (
    string">"errors"
    string">"fmt"
    string">"os"
)
 
func readFile(filename string) (string, error) {
    if filename == string">"" {
        return string">"", errors.New(string">"filename cannot be empty")
    }
    
    data, err := os.ReadFile(filename)
    if err != nil {
        return string">"", fmt.Errorf(string">"failed to read file: %w", err)
    }
    
    return string(data), nil
}
 
func main() {
    content, err := readFile(string">"example.txt")
    if err != nil {
        fmt.Printf(string">"Error: %v\n", err)
        return
    }
    
    fmt.Println(string">"File contents:", content)
}
 

package main
 
import (
    string">"fmt"
    string">"sync"
    string">"time"
)
 
func worker(id int, jobs <-chan int, results chan<- int, wg *sync.WaitGroup) {
    defer wg.Done()
    
    for j := range jobs {
        fmt.Printf(string">"Worker %d started job %d\n", id, j)
        time.Sleep(time.Second)
        fmt.Printf(string">"Worker %d finished job %d\n", id, j)
        results <- j * 2
    }
}
 
func main() {
    const numJobs = 5
    const numWorkers = 3
    
    jobs := make(chan int, numJobs)
    results := make(chan int, numJobs)
    
    string">"comment">// Start workers
    var wg sync.WaitGroup
    for w := 1; w <= numWorkers; w++ {
        wg.Add(1)
        go worker(w, jobs, results, &wg)
    }
    
    string">"comment">// Send jobs
    for j := 1; j <= numJobs; j++ {
        jobs <- j
    }
    close(jobs)
    
    string">"comment">// Wait for all workers to complete
    wg.Wait()
    close(results)
    
    string">"comment">// Collect results
    for r := range results {
        fmt.Println(string">"Result:", r)
    }
}