func make ([] type, size, capacity)

//Golang program to merge two hash collections
package main

import "fmt" //import fmt package in the program

//Main function to execute the program
func main() {
   hashmap1 := map[string]string{  //create hashmap1 using map literal
      "item1": "value1",
      "item2": "value2",
   }
   hashmap2 := map[string]string{   //create hashmap2 using map literal
      "item2": "new_value",
      "item3": "value3",
   }

   merge_hashmap := make(map[string]string)  //create this map to store the merged values

   for key, value := range hashmap1 {
      merge_hashmap[key] = value //iterate the map1 to add values in new map
   }

   for key, value := range hashmap2 {
      merge_hashmap[key] = value //iterate the map2 to add values in new map 
   }

   fmt.Println("The map after its merged:")
   fmt.Println("Merged hash:", merge_hashmap)//print the new map 
}

The map after its merged:
Merged hash: map[item1:value1 item2:new_value item3:value3]