gistfile1.java

import java.util.Scanner;

public class exercise3 {
	
	public static void main(String[] args) {
		
		Scanner in = new Scanner(System.in);
		
		System.out.println("please enter a natural number.");
		int naturalNumber = in.nextInt();
		
		int count = 0 ;
		
		while( naturalNumber !=1) {
			if (naturalNumber%2 == 0) 
				naturalNumber = natualNumber/2;
			count++ ;
			else (naturalNumber%2 != 0) 
				naturalNumber = naturalNumber*3 +1;
			count++ ;
		}
		
		System.out.println("The number of steps in told was " + count);
	}
		
}