Print Variable Which Only Exists Within For Loop?

There's loads of problems with this. What I'm trying to do.

1) get a program to add the contents of an array together, preferably with a for loop and not the heavy handed version I've tried to use here.

2) get the for loop's output just once, since it won't compile or recognise the variable outside of the loop. How do I make the loop's 'counter' variable available everywhere?

public class retint {
 public static void main(String[] args){
int[] onetoTen = {1,2,3,4,5,6,7,8,9,10};
for (int i=0; i<10; i++) {
int counter = (onetoTen[0] + onetoTen[1] + onetoTen[2] + onetoTen[3] + onetoTen[4] + onetoTen[5] +
onetoTen[6] + onetoTen[7] + onetoTen[8] + onetoTen[9]);
 System.out.println(counter); 
}
}

Terrible code, I know. There has to be a more efficient way.