Do while

import java.util.Scanner;
public class Do_While
{
public static void main(String args[])
{
Scanner masuk=new Scanner(System.in);
int bil,jumlah,rata_rata;
jumlah=jumlah + bil;
rata_rata=jumlah/bil;
bil=3;
do
{
System.out.println(bil);
System.out.println(jumlah=+jumlah);
System.out.println(rata_rata=+rata_rata);
bil+=3;
}
while(bil<=20);
}
}