Lecture notes - April 15

• Questions?

• Go over homework.
  • color change 13.10.3 (page 272 #3)
    What color should the background be?
  • same with simple input validation; it complains if text isn't 6 characters.
    What color should the background be now?
• Loops - chapter 15
  • "for" loop and counters
  • shortcut operators: i++ , i--
  • "while" loops
  • example: validating user input with "while" until they get it right.
  • flowchart diagrams
  • nested loops , especially for tables

• Examples
  • Counting by 7's :
    1, 8, 15, 22, 29, 36, 43, 50, 57, 64, 71, 78, 85, 92, 99

  • A table of blue green colors :
    

    #00ffff

    #00efff

    #00dfff

    #00cfff

    #00bfff

    #00afff

    #009fff

    #008fff

    #007fff

    #006fff

    #005fff

    #004fff

    #003fff

    #002fff

    #001fff

    #000fff

    #00ffef

    #00efef

    #00dfef

    #00cfef

    #00bfef

    #00afef

    #009fef

    #008fef

    #007fef

    #006fef

    #005fef

    #004fef

    #003fef

    #002fef

    #001fef

    #000fef

    #00ffdf

    #00efdf

    #00dfdf

    #00cfdf

    #00bfdf

    #00afdf

    #009fdf

    #008fdf

    #007fdf

    #006fdf

    #005fdf

    #004fdf

    #003fdf

    #002fdf

    #001fdf

    #000fdf

    #00ffcf

    #00efcf

    #00dfcf

    #00cfcf

    #00bfcf

    #00afcf

    #009fcf

    #008fcf

    #007fcf

    #006fcf

    #005fcf

    #004fcf

    #003fcf

    #002fcf

    #001fcf

    #000fcf

    #00ffbf

    #00efbf

    #00dfbf

    #00cfbf

    #00bfbf

    #00afbf

    #009fbf

    #008fbf

    #007fbf

    #006fbf

    #005fbf

    #004fbf

    #003fbf

    #002fbf

    #001fbf

    #000fbf

    #00ffaf

    #00efaf

    #00dfaf

    #00cfaf

    #00bfaf

    #00afaf

    #009faf

    #008faf

    #007faf

    #006faf

    #005faf

    #004faf

    #003faf

    #002faf

    #001faf

    #000faf

    #00ff9f

    #00ef9f

    #00df9f

    #00cf9f

    #00bf9f

    #00af9f

    #009f9f

    #008f9f

    #007f9f

    #006f9f

    #005f9f

    #004f9f

    #003f9f

    #002f9f

    #001f9f

    #000f9f

    #00ff8f

    #00ef8f

    #00df8f

    #00cf8f

    #00bf8f

    #00af8f

    #009f8f

    #008f8f

    #007f8f

    #006f8f

    #005f8f

    #004f8f

    #003f8f

    #002f8f

    #001f8f

    #000f8f

    #00ff7f

    #00ef7f

    #00df7f

    #00cf7f

    #00bf7f

    #00af7f

    #009f7f

    #008f7f

    #007f7f

    #006f7f

    #005f7f

    #004f7f

    #003f7f

    #002f7f

    #001f7f

    #000f7f

    #00ff6f

    #00ef6f

    #00df6f

    #00cf6f

    #00bf6f

    #00af6f

    #009f6f

    #008f6f

    #007f6f

    #006f6f

    #005f6f

    #004f6f

    #003f6f

    #002f6f

    #001f6f

    #000f6f

    #00ff5f

    #00ef5f

    #00df5f

    #00cf5f

    #00bf5f

    #00af5f

    #009f5f

    #008f5f

    #007f5f

    #006f5f

    #005f5f

    #004f5f

    #003f5f

    #002f5f

    #001f5f

    #000f5f

    #00ff4f

    #00ef4f

    #00df4f

    #00cf4f

    #00bf4f

    #00af4f

    #009f4f

    #008f4f

    #007f4f

    #006f4f

    #005f4f

    #004f4f

    #003f4f

    #002f4f

    #001f4f

    #000f4f

    #00ff3f

    #00ef3f

    #00df3f

    #00cf3f

    #00bf3f

    #00af3f

    #009f3f

    #008f3f

    #007f3f

    #006f3f

    #005f3f

    #004f3f

    #003f3f

    #002f3f

    #001f3f

    #000f3f

    #00ff2f

    #00ef2f

    #00df2f

    #00cf2f

    #00bf2f

    #00af2f

    #009f2f

    #008f2f

    #007f2f

    #006f2f

    #005f2f

    #004f2f

    #003f2f

    #002f2f

    #001f2f

    #000f2f

    #00ff1f

    #00ef1f

    #00df1f

    #00cf1f

    #00bf1f

    #00af1f

    #009f1f

    #008f1f

    #007f1f

    #006f1f

    #005f1f

    #004f1f

    #003f1f

    #002f1f

    #001f1f

    #000f1f

    #00ff0f

    #00ef0f

    #00df0f

    #00cf0f

    #00bf0f

    #00af0f

    #009f0f

    #008f0f

    #007f0f

    #006f0f

    #005f0f

    #004f0f

    #003f0f

    #002f0f

    #001f0f

    #000f0f

• for Thursday: please read chapters 15, 16, and
  see the class homepage for the written assignment due next Tuesday.