// 10/11/2017

/** While loop
 */

import java.util.Scanner;

public class WhileLoop {
  /**
   */
  public static void main(String[] args)   {
    
    int number=5; // loop will execute 'number' times
    while (number > 0) {
      System.out.println("Hello, number is now: " + number);
      number--;
    } // end of while loop
     
    number=1; // loop will execute 5 times
    while (number <= 5) {
      System.out.println("Hello, number is now: " + number);
      number++;
    } // end of while loop
    
    // now we are going to ask the user how many times loop should run
    Scanner in = new Scanner(System.in);
    System.out.print("How many pieces of data are there?");
    number = in.nextInt();
    System.out.println("OK, will run " + number + " times. ");
    int datum=0; // have to initialize if value is given in loop
    // while loop that executes 'number' times
    // each iteration one piece of data is read in
    while (number>0) {
      System.out.print("number: " + number + ": Enter next integer: "); 
      datum = in.nextInt();
      System.out.println("datum is : " + datum);
      number--;
    }
    System.out.println("Fell out of loop, number is: " + number
                         + " datum is: " + datum);
    
    
    
    
  }
}