온라인 Go 컴파일러

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

package main
import "fmt"
func main() {
    name := "Alice"
    age := 30
    height := 5.6
    fmt.Printf("%s is %d years old\n", name, age)
    fmt.Printf("Height: %.1f\n", height)
}

package main
import "fmt"
func main() {
    x := 10
    if x > 0 {
        fmt.Println("Positive")
    } else if x == 0 {
        fmt.Println("Zero")
    } else {
        fmt.Println("Negative")
    }
}

package main
import "fmt"
func main() {
    for i := 0; i < 5; i++ {
        fmt.Printf("Count: %d\n", i)
    }
    fruits := []string{"apple", "banana", "cherry"}
    for _, fruit := range fruits {
        fmt.Println(fruit)
    }
}

package main
import "fmt"
func greet(name string, greeting ...string) string {
    g := "Hello"
    if len(greeting) > 0 { g = greeting[0] }
    return fmt.Sprintf("%s, %s!", g, name)
}
func main() {
    fmt.Println(greet("Alice"))
    fmt.Println(greet("Bob", "Hi"))
}

package main
import "fmt"
func main() {
    fruits := []string{"apple", "banana", "cherry"}
    fruits = append(fruits, "date")
    fmt.Println(fruits[1])
    person := map[string]interface{}{"name": "Alice", "age": 30}
    fmt.Println(person["name"])
}

package main
import "fmt"
type Dog struct {
    Name  string
    Breed string
}
func (d Dog) Bark() string {
    return fmt.Sprintf("%s says Woof!", d.Name)
}
func main() {
    dog := Dog{Name: "Rex", Breed: "Labrador"}
    fmt.Println(dog.Bark())
}

package main
import (
    "fmt"
    "strconv"
)
func main() {
    val, err := strconv.Atoi("not a number")
    if err != nil {
        fmt.Printf("Error: %v\n", err)
    } else {
        fmt.Println(val)
    }
}

package main
import (
    "fmt"
    "os"
)
func main() {
    os.WriteFile("output.txt", []byte("Hello, File!"), 0644)
    content, _ := os.ReadFile("output.txt")
    fmt.Println(string(content))
}

package main
import (
    "fmt"
    "sync"
)
func main() {
    var wg sync.WaitGroup
    for i := 0; i < 3; i++ {
        wg.Add(1)
        go func(n int) {
            defer wg.Done()
            fmt.Printf("Goroutine %d\n", n)
        }(i)
    }
    wg.Wait()
}