variable getter functions in golang

Consider the following stack implementation in go:

package main
import "fmt"
var a [10]int
var top int = -1
func main() {
	printStack()
	push(1)
	printStack()
	push(23)
	printStack()
	pop()
	push(2)
	printStack()
	println("Top element is", getTop)
}
func push(x int) {
	top += 1
	a[top] = x
}
func pop() {
	top -= 1
}
func getTop() int {
	return a[top]
}
func printStack() {
	fmt.Println(top+1, "Stack: ", a, "Top", getTop)
}

Questions:

1. When I use println("Top element is", getTop), it prints out memory address 0x193928 but when I call println("Top element is", getTop()), it returns 2. Returning 2 makes sense but I don't understand why its returning memory address? shouldn't call getTop without brackets be invalid?
2. It seems that you can't have variable & functions with same name in golang. is that correct assumption to make?

Play: https://play.golang.org/p/vvOGG296gr

1. You can pass your function as a var, for example: https://play.golang.org/p/wzGVtsEFQk . So getTop is a "function pointer", which explains the address being printed

2. Explained by #1: if it is declared in the same scope, your var name and function name collide