Functions also have the ability to return multiple values. Check out the example below:

func GPA(midtermGrade float32, finalGrade float32) (string, float32) {
  averageGrade := (midtermGrade + finalGrade) / 2
  var gradeLetter string
  if averageGrade > 90 {
    gradeLetter = "A"
  } else if averageGrade > 80 {
    gradeLetter = "B"
  } else if averageGrade > 70 {
    gradeLetter = "C"
  } else if averageGrade > 60 {
    gradeLetter = "D"
  } else {
    gradeLetter = "F"
  }

  return gradeLetter, averageGrade 
}

Above, after the parentheses which contain our parameters, we need to provide the types of the multiple returns wrapped in their own set of parentheses. The GPA() function will return 2 values, the first value is a string and the second value is an int32. Also, when we return multiple values, we use a single return keyword followed by the values separated by commas: gradeLetter, averageGrade. When we call the function:

func main() {
  var myMidterm, myFinal float32
  myMidterm = 89.4
  myFinal = 74.9
  var myAverage float32
  var myGrade string
  myGrade, myAverage = GPA(myMidterm, myFinal)
  fmt.Println(myAverage, myGrade) // Prints 82.12 B
}

We’re able to call GPA() with the necessary arguments and it returns back both 82.12 and B which we print to the terminal.