Arithmetic Operators

Arithmetic Operators

Addition                                       +

Subtraction                                  -

Multiplication                              *

Division                                         /

Remainder                                  %

Increment                                    ++

Addition Assignment                  +=

Subtraction Assignment              -=

Multiplication Assignment         *=

Division Assignment                    /=

Modulus Assignment                 %=    

Decrement                                    --

Arithmetic Operators

üIf either or both operands associated with an arithmetic operator

 are floating point, the result is a floating point.

ü% operator applies both to floating-point type and integer types.

üExample:

 

class modulus

{

  public static void main (String args [])

  {

  int x = 42;

  double y = 42.3;

  System.out.println(“x mod 10 =“ + x%10);

  System.out.println(“y mod 10 = “ + y%10);

  }

}

Output:

x mod 10 =2

y mod 10 = 2.3

Increment and Decrement

üThe increment and decrement operators are

 arithmetic and operate on one operand

üThe increment operator (++) adds one to its 

operand

üThe decrement operator (--) subtracts one from

 its operand

üThe statement  count++;

is functionally equivalent to   count = count + 1;

Increment and Decrement

üThe increment and decrement operators can be

 applied in prefix form (before the operand) or

postfix form (after the operand)

üWhen used alone in a statement, the prefix and 

postfix forms are functionally equivalent.  That is,

  count++;

  is equivalent to ++count;

Increment and Decrement

üWhen used in a larger expression, the prefix and 

postfix forms have different effects

üIn both cases the variable is incremented

 (decremented)

üBut the value used in the larger expression depends on

 the form used.

üIf count currently contains 45, then the statement  total

 = count++;

    assigns 45 to total and 46 to count

üIf count currently contains 45, then the statement  total

 = ++count;

  assigns the value 46 to both total and count