//recall the HighLowGUI2 with the while loop...
//let's limit the maximum number of guesses
HighLowMaxGUI h2 = new HighLowMaxGUI(10);
h2.makeGuess()

//let's print the square of numbers from 1 to 4:
System.out.println(1 * 1);
System.out.println(2 * 2);
System.out.println(3 * 3);
System.out.println(4 * 4);
//what if we want to do it for 1 to 300?
//we need a loop!
WhileDemo.printSquares(10)

//printing a string backward:
WhileDemo.printRString("ABCDE")
String r
r = WhileDemo.printRString("ABCDE");  //what's  wrong? how we store the result back?
//we need to write a method that reverses the string and returns the result as a string.
//reversing a string:  "abcd" -> "dcba"
//starting from the end, we go backward and concat characters:
//  "d" 
//       + "c"
//	       + "b"
//                    + "a"
// end index: length - 1
// character at position i: s.charAt(i)

WhileDemo.reverseString("Thursday")
String r;
r = WhileDemo.reverseString("Thursday")

//let's do it another way (there are many different ways to do it
//watch out for boundary condition in the loop
WhileDemo.reverseString2("Thursday")


int i = 0;
while( i < 10) {
  System.out.println( i);
  i++;
}

/* we can do the above while loop using "for loop":
   * for(initialization; condition; updatestatement) {
   *   body
   * }
*/
 
for(int i = 0; 10 < 5; i++) {
  System.out.println(i);
}
  
//for loops are good to use when you know the range

//example; decreasing
for (int j=8; j>2; j--){
  System.out.println(j);
}

//the following causes infinite loop, why?
for (int j=8; j>2; j++){
  System.out.println(j);
}


//let's do the string reversal using for loop.
ForDemo.reverse("Today is Thursday.")
ForDemo.reverse(null)

//let's write a tester for reverse in ForDemo
//we didn't cover this in lecture, but very simple!