=========================  QUICK EXERCISE: compound statement without braces

  ..............................................   indentation is for humans!

=========================  DEMO: TimePrinter

> TimePrinter.toString( 100 )
"1 minutes 40 seconds"
> TimePrinter.toString( 10000 )
"2 hours 46 minutes 40 seconds"
> TimePrinter.toString( 1000000 )
"11 days 13 hours 46 minutes 40 seconds"
> TimePrinter.toString( 1000000000000 )
NumberFormatException: For input string: "1000000000000"
  at java.lang.NumberFormatException.forInputString
     (NumberFormatException.java:48)
  at java.lang.Integer.parseInt(Integer.java:459)
  at java.lang.Integer.valueOf(Integer.java:553)

  ...............................   so, use doubles, with scientific notation

> TimePrinter.toStringFromDouble( 1000000000000.0 )
"31688 years 1 months 1 days 15 hours 46 minutes 41.0 seconds"

=========================  NEXT EXERCISE: for-loop with different ctrl values

    int[] mileage = { 3, 5, 8, 5, 8, 0, 12,
                      3, 6, 8, 5, 8, 0, 14,
                      3, 6, 8, 6, 8, 0, 16,
                      3, 7, 8, 5, 9, 0, 12,
                      3, 7, 8, 6, 9, 0, 18,
                      0, 7, 8, 6, 9, 0, 20 };
    int sum = 0;
    for (int i = 6; i < mileage.length; i = i + 7)
      sum = sum + mileage[i];
    System.out.println( sum );       // ---> 92

  ...............................   what if...

  - I wanted to know the mileage I ran on Wednesdays?
  - I wanted to know my mileage every other day?
  - I wanted to count the Sundays I ran more than 12 miles?






=========================  NEXT EXERCISE: creating blank Sudoku grids

    Picture p = new Picture();
    p = p.makeSudokuGrid();
    p.show();
    // p.write( "/Users/wallingf/Desktop/blank-grid.jpg" );

  ...............................   what if...

  - I want a grid of a different size?
    - make width a parameter
    - convert constants into computed values!






=========================  LAST EXERCISE: design solution to Homework 4