Lecture Notes on 12 Feb 2014

Assume that num and ch are variables as defined below:
* num - integer variable

* ch - string of a single character

Write boolean expressions that evaluate to True under
the following conditions

* num is an even integer
  (num % 2 == 0)   (num % 2 != 1)

* num is an odd integer
  (num % 2 != 0) 

* num is a divisor of 12
  (12 % num == 0)

* num is a multiple of 12
  (num % 12 == 0)

* num is a 3-digit number that is divisible by 3
  (num >= 100) and (num <= 999) and (num % 3 == 0)

* num is a 2-digit number that is divisible by 5 but not by 6
  (num >= 10) and (num <= 99) and (num % 5 == 0) and (num % 6 != 0)

* ch is a letter in the English alphabet
  ((ch >= 'a') and (ch <= 'z')) or ((ch >= 'A') and (ch <= 'Z'))

* ch is a part of floating point number
  ((ch >= '0') and (ch <= '9')) or (ch == '+') or (ch == '-') or (ch == '.')

* ch is a vowel
  ((ch == 'a') or (ch == 'e') or (ch == 'i') or (ch == 'o') or (ch == 'u'))

* y is a leap year
  (y % 400 == 0) or ((y % 100 != 0) and (y % 4 == 0))