dictionary in Go
``` package main import "fmt" func main() { m := make(map[int]int) m[1] = 1 m[2] = 2 m[3] = 3 delete(m, 1) if v, ok := m[2]; ok { fmt.Println(v) } for k, v := range m { fmt.Print(k, ":", v, "\n") } } ```
``` package main import "fmt" func main() { m := make(map[int]int) m[1] = 1 m[2] = 2 m[3] = 3 delete(m, 1) if v, ok := m[2]; ok { fmt.Println(v) } for k, v := range m { fmt.Print(k, ":", v, "\n") } } ```