Example to show the output of json without using omitempty tag

withoutomitempty.go

package main

type Person struct {
  Name string
  Age int
}

func main() {
	p := Person{
		Name: "Nikhil",
	}
	b, _ := json.Marshal(p)
	fmt.Println(string(p))
}

// Output
- {"Name":"Nikhil","Age":0}