Declared but not used

Question

I am new to Golang. I am confused why I got the error that partial is not used in the code below?

// Using var keyword
var partial string

for i, request := range requestVec {
    if i == (len(requestVec)-1) && !strings.Contains(request, "\r\n\r\n") {
        partial = request
        break
    }
}

I assign request to partial in the if statement.

But you do nothing with it....what's the point of assigning it if you won't use it later? — de3, Nov 02 '20 at 23:10
It is an error to declare a variable without using it. You do not use `partial`, therefor you get this error. — JimB, Nov 02 '20 at 23:30
Does this answer your question? [How to avoid annoying error "declared and not used"](https://stackoverflow.com/questions/21743841/how-to-avoid-annoying-error-declared-and-not-used) — , Nov 04 '20 at 10:24

score 1 · Accepted Answer · answered Nov 04 '20 at 08:57

It is a compiler error in Go to declare a variable without using it.

In the code in you're example the variable partial is never used, only assigned, so is seen as unused. If you added additional code that read the variable then the error would be resolved. For example

var partial string

for i, request := range requestVec {
    if i == (len(requestVec)-1) && !strings.Contains(request, "\r\n\r\n") {
        partial = request
        break
    }
}

fmt.Println(partial) // We are now using `partial`

Declared but not used

1 Answers1

Linked

Related