Golang mixed assignment and declaration

Question

I started working with go for a few weeks, and (once again) I stumbled across something that seems odd for me:

// Not working
a := 1
{
    a, b := 2, 3
}

//         


        

Answer 1

According to the golang the documentation:

An identifier declared in a block may be redeclared in an inner block.

That's exactly what your example is showing, a is redeclared within the brackets, because of the ':=', and is never used.

A solution is to declare both variable and then use it:

var a, b int
{
    b, a = 2, 3
    fmt.Println(b)
}
fmt.Println(a)