CS 101 Notes 10/14/2010

We can combine multiple if statements
into what is often called an "else-if" clause.

if (yearCode == 1)
   {
     System.out.println ("Freshman");
   }
else if ( yearCode == 2)
   {
     System.out.println ("Sophomore");
   }
else if ( yearCode == 3)
   {
     System.out.println ("Junior");
   }
else if (yearCode == 4)
   {
     System.out.println ("Senior");
   }
else
   {
     System.out.println ("Unknown");
   }



Boolean Operators - AND  &&, OR ||, NOT  !

     take values of TRUE and FALSE and compute 
        a result that is either TRUE or FALSE


    AND - Binary operators (takes 2 operands)
      the result is TRUE if both operands are TRUE
        otherwise the result is FALSE

       if ((number >= 1) && (number <= 10))


    OR - Binary operator (takes 2 operands)
      the result of TRUE if at least one operand is TRUE
         otherwise the result if FALSE

       if ((yearCode == 3) || (yearCOde ==4))


    NOT - unary operator (takes 1 operand)
       the result if TRUE when the operand is FALSE
          otherwise the result is FALSE

        if (!(value == 10))



   X  Y "  X && Y   X || Y   !X
  ===============================
   T  T "    T        T       F
   T  F "    F        T       F
   F  T "    F        T       T
   F  F "    F        F       T