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Hello Word​

package main

import "fmt"

func main() {
  message := greetMe("world")
  fmt.Println(message)
}

func greetMe(name string) string {
  return "Hello, " + name + "!"
}

Variables​

Strings​

str := "Hello"
str := `Multiline
  string`

Numbers​

num := 3          // int
num := 3.         // float64
num := 3 + 4i     // complex128
num := byte('a')  // byte (alias for uint8)

Arrays​

// var numbers [5]int
numbers := [...]int{0, 0, 0, 0, 0}

Pointers​

func main () {
  b := *getPointer()
  fmt.Println("Value is", b)
}
 
func getPointer () (myPointer *int) {
  a := 234
  return &a
}

Flow Control​

Conditional​

if day == "sunday" || day == "saturday" {
  rest()
} else if day == "monday" && isTired() {
  groan()
} else {
  work()
}

Statements in if​

if _, err := getResult(); err != nil {
  fmt.Println("Uh oh")
}

Switch​

switch day {
  case "sunday":
    // cases don't "fall through" by default!
    fallthrough

  case "saturday":
    rest()

  default:
    work()
}

For-Range loop​

entry := []string{"Jack","John","Jones"}
for i, val := range entry {
  fmt.Printf("At position %d, the character %s is present\n", i, val)
}

For loop​

for count := 0; count <= 10; count++ {
  fmt.Println("My counter is at", count)
}