Arithmetic Operations
      Integer  Operations
            The result of arithmetic operations with both operands as
            integer is integer
            Examples:
 
                               70 – 31                        3**2                             8 / 3
      Real  Operations
            The result of arithmetic operations with both operands as real is real
             Examples:
 
                               70.0 – 31.0                3.0**2.0                   8.0 / 3.0