Variable not declared, inside a if..else statement in Go?

Answer • 1 Asked • Jan 20 2020
I'm just started learning go lang, and I am confused about declaring variables in go lang

for example I've declare req, er inside if...else statement.
if strings.EqualFold(r.Method, "GET") || strings.EqualFold(r.Method, "") { req, er := http.NewRequest(r.Method, r.Uri, b) } else { req, er := http.NewRequest(r.Method, r.Uri, b) } if er != nil { // we couldn't parse the URL. return nil, &Error{Err: er} } // add headers to the request req.Host = r.Host req.Header.Add("User-Agent", r.UserAgent) req.Header.Add("Content-Type", r.ContentType) req.Header.Add("Accept", r.Accept) if r.headers != nil { for _, header := range r.headers { req.Header.Add(header.name, header.value) } }

But I've got error from terminal
./goreq.go:127: req declared and not used ./goreq.go:127: er declared and not used ./goreq.go:129: req declared and not used ./goreq.go:129: er declared and not used

seems like anything I declared inside If statement is not working... How can I solved it?

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