Answer by jnmoal for Golang mixed assignment and declaration

According to thegolang 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)