Go Function Return values

In Go, a function can be used to return 1 or more values. To return a value from a function we need to set a return type after closing parentheses and have a return keyword with the value.

Go Function return value syntax

func FunctionName(param1 type, param2 type, param3 type) type {
  // set of code to be executed
  return output
}

Go Function Return Example

Below is an example of Integer return type

package main
import ("fmt")

func do_plus_numbers(x int, y int) int {
  return x + y
}

func main() {
  fmt.Println(do_plus_numbers(1, 2))
}

Output

Go Function another Return Example

Below is an example of a String return type

package main
import ("fmt")

func say_hello_person(name string) string{
  return "hello " + name
}

func main() {
  fmt.Println(say_hello_person("Jhon"))
}

Output

hello Jhon

Go Function Multiple Return values

In Go, you can return multiple values from a function by specifying type for each value

package main
import ("fmt")

func do_plus_and_minus_numbers(x int, y int) (plus_value int, minus_value int) {
  plus_value = x + y
  minus_value = x - y
  return
}

func main() {
  fmt.Println(do_plus_and_minus_numbers(3, 2))
}

Output

5 1

Go Function Multiple Return values different types

In Go, you can return multiple values from a function by specifying type for each value

package main
import ("fmt")

func do_plus_and_minus_numbers(x int, name string) (plus_value int, say_hi_to_name string) {
  plus_value = x + x
  say_hi_to_name = "hi " + name 
  return
}

func main() {
  fmt.Println(do_plus_and_minus_numbers(3, "Jhon"))
}

Output

6 hi Jhon

Conclusion

In this page (written and validated by A. Gawali) you learned about Go Function Return values . What's Next? If you are interested in completing Go tutorial, your next topic will be learning about: Go Function Recursion.

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