public class Test41{
public static void main(String[] args){
int[] arr={1,2,3,4,5,6,7};
System.out.println(avg(arr));
}
public static double avg(int[] a){
int ret=0;
double sum;
for(int x:a){
ret+=x;
}
sum=ret/a.length;
return sum;
}
}