Arithmetic Expressions

• +,- as expected
• * is multiply
• / is strange
  • For float types it is fine.
  • For integers it is integer division.
    • 5/3 = 2
    • 4/7 = 0
• The other part of integer division is % (modulus)
  • This is the remainder part.
  • 5 % 3 = 2
  • 4 % 7 = 4
  • This is more useful than you would think.
• Some strange ones
  • We do i = i + 1 so often they gave us two short cuts
    • ++i
    • i++
  • We do things like i = i * n frequently so they gave us
    • triple *= 3;
    • luck += 7;
    • age /= 15;
    • months %= 9;
• Look at appendix B, operator precedence.
• Please Excuse My Dear Aunt Sally applies
• () work just fine.