Go Sample

README.md

go

Sample Go

exported_names.go

package main

import (
  "fmt"
  "math"
)

func main() {
  fmt.Println(math.Pi)
}

functions.go

package main

import "fmt"

func add(x int, y int) int {
  return x + y
}

func main() {
 fmt.Println(add(42, 13))
}

functions_continued.go

package main

import "fmt"

func add(x, y int) int {
  return x + y
}

func main() {
 fmt.Println(add(42, 13))
}

hello.go

package main

import "fmt"

func main() {
  fmt.Printf("hello, world\n")
}

html.go

package main

import (
   "fmt"
   "net"
   "os"
   "time"
)

func main() {
  fmt.Println("Welcome to the playground!")
  fmt.Println("The time is", time.Now())
  fmt.Println("And if you try to open a file:")
  fmt.Println(os.Open("filename"))

  fmt.Println("Or access the network:")
  fmt.Println(net.Dial("tcp", "google.com"))
}

imports.go

package main

import (
  "fmt"
  "math"
)

func main() {
 fmt.Printf("Now you have %g problems.", math.Nextafter(2, 3))
 }
 

multiple_results.go

package main

import "fmt"

func swap(x, y string) (string, string) {
  return x, y
}

func main() {
  a, b := swap("hello", "world")
  fmt.Println(a, b)
}

named_results.go

package main

import "fmt"

func split(sum int) (x, y int) {
  x = sum * 4 / 9
  y = sum - x
  return
}

func main() {
  fmt.Println(split(17))
}

rand.go

package main

import (
  "fmt"
  "math/rand"
)

func main() {

  rand.Seed(30)

  fmt.Println("My favorite number is", rand.Intn(10))
}

short_variable_declarations.go

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)
}

variables.go

package main

import "fmt"

var i int
var c, python, java bool

func main() {
  fmt.Println(i, c, python, java)
}

variables_with_initializers.go

package main

import "fmt"

var i, j int = 1, 2
var c, python, java = true, false, "no!"

func main() {
  fmt.Println(i, j, c, python, java)
}