How to solve "too many arguments to return" issue

Question

In a print function I am writing, I am trying to return a value based on the result of a switch statement; however, I am getting the error too many arguments to return.

Forgive me if this question has a simple answer, but shouldn't it not matter how many arguments a function has and it can return just one thing? Or does it need to return one thing for each argument.

Here is my code. I am getting an error on the return line ( Too many arguments to return ). How can I fix it so that it returns the string set in the switch statement?

package bay  func Print(DATA []TD, include string, exclude []string, str string) {     result := NBC(DATA, include, exclude, str)     var sentAnal string     switch result {     case 1:         sentAnal = "Strongly Negative"     case 2:         sentAnal = "Very Negative"     case 3:         sentAnal = "Negative"     case 4:         sentAnal = "Little Negative"     case 5:         sentAnal = "Neurtral"     case 6:         sentAnal = "Little Positive"     case 7:         sentAnal = "Positive"     case 8:         sentAnal = "More Positive"     case 9:         sentAnal = "Very Positive"     case 10:         sentAnal = "Strongly Positive"     default:         sentAnal = "Unknown"     }     return sentAnal } 

Answer 1

You need to specify what you will return after specifying the input parameters, this is not python.

This:

func Print(DATA []TD, include string, exclude []string, str string) { 

Should be:

func Print(DATA []TD, include string, exclude []string, str string) string { 

Recommended reads:

• http://golang.org/doc/effective_go.html#multiple-returns

• http://golang.org/doc/effective_go.html#named-results

Or even all of effective go

Answer 2

The signature of the method you specified does not include a return value

func Print(DATA []TD, include string, exclude []string, str string) {

if you want to return a string you need to add the type of the return value

func Print(DATA []TD, include string, exclude []string, str string) string {

Keep in mind in GO you can return multiple values

func Print(DATA []TD, include string, exclude []string, str string) (string, string) {

You can even give a name to the return value and reference it in your code

func Print(DATA []TD, include string, exclude []string, str string) (sentAnal string) {