// Yazzy Latif
// 06/29/2020
// TA: Grace Hopper
// For Loops Practice

// This program contains a number of short methods, all of which use for loops. 

/*
   A few different general for loop patterns - note that each of these run 10 times. 
   
   for (int i = 1; i <= 10; i++) {
      body
   }
   
   for (int i = 0; i < 10; i++) {
      body
   }
   
   for (int i = 10; i >= 1; i--) {
      body
   }
*/
 
public class ForLoops {
   public static void main(String[] args) {
      printSquares();
      System.out.println();
      count();
      System.out.println();
      blastoff();
      System.out.println();
      square();
      System.out.println();
      numberPyramid();
      System.out.println();
      lineNumberPyramid();
      System.out.println();
      complexLine();
   }
   
   /*
   display the following output:
     1 squared = 1
     2 squared = 4
     3 squared = 9
     4 squared = 16
     5 squared = 25
     6 squared = 36
     Done!
   */
   public static void printSquares() {   
      for (int i = 1; // init -> 1
                     i <= 6; // test -> 2
                            i++) { // update -> 3
         System.out.println(i + " squared = " + (i * i)); // body -> 4
      }
      System.out.println("Done!"); // after -> 5
   }
   
   // display the following output:
   // 1 2 3 4 5 6 7 8 9 10
   public static void count() {
      for (int i = 1; i <= 10; i++) {
         System.out.print(i + " ");
      }
      System.out.println();
   }
   
   // What does the following method output?
   public static void blastoff() {
      System.out.print("T-minus ");
      for (int i = 10; i >= 1; i--) {
         System.out.print(i + ", ");
      }
      System.out.println("blastoff!");
   }
   
   /* display the following square of stars:
     **********
     **********
     **********
     **********
     **********
   */
   public static void square() {
      // outer loop repeats over line
      for (int line = 1; line <= 5; line++) {
         // inner loop controls in line repetition  
         for (int stars = 1; stars <= 10; stars++) {
            System.out.print("*");
         }
         System.out.println();
      }
   }

   // What is the output of the following method?
   public static void numberPyramid() {
      for (int i = 1; i <= 5; i++) {
         for (int j = 1; j <= i; j++) {
            System.out.print(j);
         }
         System.out.println();
      }
   }
   
   /* display a pyramid of line numbers
     1
     22
     333
     4444
     55555
   */
   public static void lineNumberPyramid() {
      for (int i = 1; i <= 5; i++) {
         for (int j = 1; j <= i; j++) {
            System.out.print(i);
         }
         System.out.println();
      }
   }
   
   /* display the following output
   ....1
   ...2
   ..3
   .4
   5
   */
   public static void complexLine() {
      for (int i = 1; i <= 5; i++) {
         for (int j = 1; j <= -1 * i + 5; j++) {
            System.out.print(".");
         }
         System.out.println(i);
      }
   }
}