Fun with Python: Factorial Calculator

This program written in python calculates a factorial when given an integer. The program will complain if you don't give it a valid integer, such as a letter or dollar sign.

#Andrew Samuels
#factorial calculator
#Fall 2011
#calculates a factorial from integer input from user

n = raw_input('Enter an integer: ')
try:
    n=int(n)
except:
    print 'Enter a valid integer, dummy!'
    exit(1)

f=1
while n > 1 :
    f = f * n
    n = n - 1
    print f