Golang Variable Scope problem

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Func f () (String,error) {    return "test scope of variable", Nil}func main () {    var name string    if Name,err: = f (); n Il ==err{        println (name)    }    println (name)    FMT. Println ("Hello, World ")}

The above example outputs:

Test scope of variable

============= (blank line)
Hello, World

Expectations are:
Test scope of variable
Test scope of variable
Hello, World

Cause Analysis:
Golang once encountered: = This symbol, if in a different scope, a new variable is defined, if in the same scope, the case is as follows: Define only variables that are not defined:

Package Mainimport "FMT" Func f () (str string) {    Ok,str: = F2 ()    if ok{        return     }    return "F ()"}func F2 () (b bool,str String) {    return True, "F2 ()"}func main () {    str: = f ()        FMT. Println (str)}

Output: F2 ()