nThe factorial of Nis the product of the first N positive integers:
–N * (N – 1) * (N – 2 ) * . . .* 2 * 1
nThe factorial of N can be defined recursively as
1 if N = 1
factorial(
N ) =
N * factorial( N-1 ) otherwise
The two most
important concepts in object-oriented programming are the class and the
object. In the broadest term, an object is a thing, both tangible and
intangible, which we can imagine.
A program
written in object-oriented style will consist of interacting objects. For a
program to maintain bank accounts for a bank, we may have many Account,
Customer, Transaction, and ATM objects.
An object is
comprised of data and operations that manipulate these data.
