Comparison Operators:  operand data types match, result is Boolean

    <    <=    >    >=    !=    ==

    CAUTION:  does NOT work with Strings!

Logical Operators:  operands are Boolean, result is Boolean

    && (AND operation):  result is true only if both operands are true; result is false otherwise

        true && true   =>  true
        true && false  =>  false
        false && true  =>  false
        false && false =>  false

        ex.  if (balance >= 100 && balance <= 200)

    || (OR operation):  result is true if either operand is true (or both are true); result if false if both operands are false

        true || true   =>  true
        true || false  =>  true
        false || true  =>  true
        false || false =>  false

        ex.  if (monthNum < 1 || monthNum > 12)

    !  (NOT operation):  returns the opposite Boolean value from that of the operand

        ! true   =>  false
        ! false  =>  true

        ex.  if ( ! (x <= 70) )


How to compare Strings for equality?  Use the .equals

    if ( name.equals("Sam") ) 

Comparing Strings for "not equals"  =>  Use ! and .equals

    if ( ! name.equals("Alice") )