Golang: find a key in a map; key passed via command line

execution_in_command_line

o run main.go 204

main.go

package main

import (
	"fmt"
	"os"
)

var persons map[string]string

func find(key string){
	if val, ok := persons[key]; ok {
		fmt.Println("Hi,",val)
	}else{
		fmt.Println("Sorry, not found")
	}
}

func main(){

	persons = make(map[string]string)
	persons["305"] = "Sue"
	persons["204"] = "Bob"
	persons["631"] = "Jake"
	persons["073"] = "Tracy"

	key := os.Args[1]
	find(key)

}