Is there any logic behind ASCII codes' ordering?

Question

I was teaching C to my younger brother studying engineering. I was explaining him how different data-types are actually stored in the memory. I explained him the logistics b

Answer 1

Here is very detailed history and description of ASCII codes: http://en.wikipedia.org/wiki/ASCII
In short:

• ASCII is based on teleprinter encoding standards
• first 30 characters are "nonprintable" - used for text formatting
• then they continue with printable characters, roughly in order they are placed on keyboard. Check your keyboard:
  • space,
  • upper case sign on number caps: !, ", #, ...,
  • numbers
  • signs usually placed at the end of keyboard row with numbers - upper case
  • capital letters, alphabetically
  • signs usually placed at the end of keyboard rows with letters - upper case
  • small letters, alphabetically
  • signs usually placed at the end of keyboard rows with letters - lower case