import java.util.Scanner;
import javax.swing.JOptionPane;
import java.util.Random;

public class Lab5
{
 public static void main(String[] args)
 {
   
   /* 1a - True
    * 1b - False
    * 1c - True
    * 1d - False
    * 1e - False
    * 1f - False
    */
   
   //2a
   
   for(int i=0; i<=1000; i+=10){
     System.out.println(i);
   }
   
   //2b
   int c = 0;
   while (c<=1000){
     System.out.println(c);
     c+=10;
   }
   
   //2c
   for (int i=0; i<5; i++){
     for (int j=0; j<5; j++){
       if (i!=j)
         System.out.print("#");
       if (i==j)
         System.out.print("_");
       if (j==4)
         System.out.println("");
     }
   }
   
   //2d
   
   Scanner two = new Scanner(System.in);
   int tw=1;
   int sum2=0;
   do{
     System.out.println("Input a number, or 0 if you want to be done");
     tw = two.nextInt();
     sum2=sum2+tw;
     System.out.println("Sum is "+sum2);
   }
   while(tw!=0);
   
   // 2e
   int x,y;
   String zeroes ="";
   for(x=0, y=0; x<5; x++, y+=2){
      zeroes=x+zeroes+y;
     System.out.println(zeroes);
   }
   
   //2f
   Random generator = new Random();
   System.out.println("How many random numbers do you want?");
   int a = two.nextInt();
   System.out.println("What should the upper bound be?");
   int b = two.nextInt();
   c=0;
   while(c<a){
     x = generator.nextInt(b);
     System.out.println(x);
     c++;
   }
   
   // 3
   
    Scanner keyboard = new Scanner (System.in);
    int n = 0;
    int m = 0;
    int sum=0;
    int average = 0;
    int factorial = 1;
    int counter = 0;
    String input;
    String answer;
      
    do
    {
      System.out.println("Using lowercase letters, is this the last time? ");
      answer = keyboard.nextLine();
          
//      System.out.println("How many numbers? ");
//      m = keyboard.nextInt();
    
        input = JOptionPane.showInputDialog("Enter the next number: ");
        n = Integer.parseInt(input);
//        System.out.println(n);
      
        while (n < 1 || n>9){
          input = JOptionPane.showInputDialog("Number must be at least " + 1 + " and no more than " + 9 + ". Try again:");
          n = Integer.parseInt(input);
        }
      
        factorial = 1;
        for (int j=1; j<n+1; j++){
          factorial = j*factorial;
        }
//        System.out.println(factorial);
        
        sum = sum + factorial;
        counter=counter+1;
        average = sum/counter;
        
        System.out.println("The number is: " + n);
        System.out.println("The factorial is: " + factorial);
        System.out.println("The sum of the factorials given so far is: " + sum);
        System.out.println("The average of the factorial given so far is: " + average);
      
    } while (answer.equals("no"));
 }
}