Golang-map

 1 package main
 2 
 3 import (
 4     \"fmt\"
 5 )
 6 
 7 func main() {
 8 
 9     map1 := make(map[int]string)
10     map1[5] = \"hello\"
11     map1[7] = \"world\"
12     map1[9] = \"!\"
13 
14     fmt.Println(map1[5])
15 
16     fmt.Println(map1[9])
17 
18     v, ok := map1[6]
19 
20     if !ok {
21         fmt.Println(\"this key is not exists\", v)
22     }
23 
24     delete(map1, 5)
25 
26     for k, v := range map1 {
27         fmt.Println(k, \":\", v)
28     }
29 }