安裝
shell> apt-get install golang
hello.go
package main
import "fmt"
func main() {
fmt.Printf("hello, world\n")
}
shell> go run hello.go
變數 (Variable)
package main
import "fmt"
var c, python, java bool
func main() {
var i int
fmt.Println(i, c, python, java)
}
package main
import "fmt"
var i, j int = 1, 2
func main() {
var c, python, java = true, false, "no!"
fmt.Println(i, j, c, python, java)
}
package main
import "fmt"
func main() {
var i, j int = 1, 2
k := 3
c, python, java := true, false, "no!"
fmt.Println(i, j, k, c, python, java)
}
package main
import "fmt"
func main() {
sum := 0
for i := 0; i < 10; i++ {
sum += i
}
fmt.Println(sum)
}
package main
import "fmt"
const Pi = 3.14
func main() {
const World = "世界"
fmt.Println("Hello", World)
fmt.Println("Happy", Pi, "Day")
const Truth = true
fmt.Println("Go rules?", Truth)
}
package main
import "fmt"
func main() {
fmt.Printf("hello, world\n")
}
package main
import (
"fmt"
"time"
)
func main() {
fmt.Println("Welcome to the playground!")
fmt.Println("The time is", time.Now())
}
package main
import (
"fmt"
"math"
)
func main() {
fmt.Printf("Now you have %g problems.", math.Sqrt(7))
}
package main
import (
"fmt"
"math/rand"
)
func main() {
fmt.Println("My favorite number is", rand.Intn(10))
}
package main
import (
"fmt"
"math"
)
func main() {
fmt.Println(math.Pi)
}
package main
import "fmt"
func add(x int, y int) int {
return x + y
}
func main() {
fmt.Println(add(42, 13))
}
package main
import "fmt"
func add(x, y int) int {
return x + y
}
func main() {
fmt.Println(add(42, 13))
}
package main
import "fmt"
func swap(x, y string) (string, string) {
return y, x
}
func main() {
a, b := swap("hello", "world")
fmt.Println(a, b)
}
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