strconv.Atoi() throwing error when given a string

string go atoi strconv
dead beef picture dead beef · Apr 29, 2016 · Viewed 30.3k times · Source

When trying to use strconv on a variable passed via URL(GET variable named times), GoLang fails on compilation stating the following:

multiple-value strconv.Atoi() in a single-value context

However, when I do reflect.TypeOf I get string as the type, which to my understanding is the correct type of argument.

I have been trying to fix this issue for several hours. I'm new to go and have become pretty frustrated with this problem. I finally decided to ask for help. Any feedback would be appreciated.

func numbers(w http.ResponseWriter, req *http.Request) {
  fmt.Println("GET params were:", req.URL.Query()); 
  times := req.URL.Query()["times"][0]
  time := strconv.Atoi(times)

  reflect.TypeOf(req.URL.Query()["times"][0]) // returns string
}

Answer

Cerise Limón picture Cerise Limón · Apr 29, 2016

The error is telling you that the two return values from strconv.Atoi (int and error) are used in a single value context (the assignment to time). Change the code to:

   time, err := strconv.Atoi(times)
   if err != nil {
      // handle error
   }

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