publicclass JAVA_029
 {

    publicstaticvoid main(String[] args)
    {
       int limit=20;
       int sum=0;
       int i=1;
 
       do 
       {
          sum+=i;
          i++;
       }
       while(i<=limit);

       System.out.println("Sum of first 20 integers = " + sum);
    }
 }