Lecture Notes on 25 Jun 2012

if (x > y)
{
  if (x < y)
  {
    z = 1;
  }
  else
  {
    z = 2;
  }
}
else
{
  z = 3;
}

int month = x;
switch (month)
{
  case 1:
  case 3:
  case 5:
  case 7:
  case 8:
  case 10:
  case 12: System.out.println ("31 days"); break;
  case 4:
  case 6:
  case 9:
  case 11: System.out.println ("30 days"); break;
  case 2: System.out.println ("28 days"); break;
  default: System.out.println ("Not valid month"); break;
}


Default variables 

int num;

char ch;

* Write a boolean expression that evaluates to true if num is even.
(num % 2 == 0)

 
* Write a boolean expression that evaluates to true if num is in
the range 1 through 100 inclusive.
(num >= 1) && (num <= 100)

* Write a boolean expression that evaluates to true if num is not in
the range 1 through 100 inclusive.
(num < 1) || (num > 100)

* Write a boolean expression that evaluates to true if ch is a lower
case letter.

(ch >= 'a') && (ch <= 'z')

* Write a boolean expression that evaluates to true if num is a
four digit number that is divisible by 6.

(num >= 1000) && (num <= 9999) && (num % 6 == 0)

(year % 400 == 0) || ((year % 100 != 0) && (year % 4 == 0))