Variable declaration outside of functions

---

examples/variable-declaration/declaration.go

package main

import "fmt"

var g int

// g = 1    // syntax error: non-declaration statement outside function body

var i int = 2

// i := 42   // syntax error: non-declaration statement outside function body

func main() {
    g = 1
    i := 42 // type inferred

    fmt.Println(g)
    fmt.Println(i)
}

// var i int
// i = 42

// var i int = 42
// i := 42   // (is the same but this one cannot be used on the package level

// var (
//    i = 42
//    j = 23
// )