package jibencaozuo;
public class Exam1_2 {
public static void main(String args[]){
int sum;
sum=0;
int arrayList[] = new int[20];
for (int i = 0; i <=19; i++) {
arrayList[i]=i+1;
}
int pos=0;
while(pos<20){
if (______)
sum=sum+arrayList[pos];
pos++;
}
System.out.println("!!sum="+sum);
}
}