loop.java

import java.util.Scanner;

public class loop {
 public static void main(String[] args) {
 int num;
 Scanner inp = new Scanner(System.in);
 System.out.println("enter a number:");
 num = inp.nextInt();

 int count=0,total = 0 ;
 double average=0;

 for (int i = 0; i < num; i++) {
 if(i % 3 == 0 || i % 4 == 0){
 total += i;
 count++;
 }
 }
 average = total/count;
 System.out.println("average is :"+average);
 inp.close();
 }
 
}