Code

   
    /// Name: Afaf Nabeeha
    /// Period: 7
    /// Program Name: Collatz Sequence
    /// File Name: Collatz.java
    /// Date Finished: 1/29/2016 public class Collatz

        import java.util.Scanner;
        public class Collatz
        {
            public static void main( String[] args )
            {
                Scanner keyboard = new Scanner(System.in);
                int input, counter;
                input = 0;
                counter = 0;
                System.out.print( "Starting number: " );
                input = keyboard.nextInt();
                while ( input != 1 )
                {
                    if (input % 2 == 0 )
                    {
                        input = input / 2;
                    }
                    else if ( input % 2 != 0 )
                    {
                        input = input*3 + 1;
                    }
                    System.out.print( input + "\t" );
                    counter++;
                }
                System.out.println( "Terminated after " + counter + " steps. " );
            }
        }   
             
    
Picture of the output