Lecture Notes on 25 Sep 2009


# This program prompts the user to enter his birthday and
# it returns the lucky number for the user


# This function adds the digits of a given number
def sumDigits (n):
  sum = 0
  while (n >0):
    sum = sum + (n % 10)
    n = n / 10
  return sum

def main():
  day = input ("Enter birth day: ")
  month = input ("Enter birth month: ")
  year = input ("Enter birth year: ")
  sum = day + month + year
  while (sum >= 10):
    sum = sumDigits (sum)

  print "Your Lucky Number is:", sum

main()



# This program prompts the user for an upper limit and
# it returns all the prime numbers below it


# This function determines if a given number is prime or not
def isPrime (n):
  limit = int (n**0.5)
  count = 2
  while (count <= limit):
    if (n % count == 0):
      return False
    count = count + 1

  return True

def main():
  count = 2
  limit = input ("Enter upper limit: ")
  while (count <= limit):
    if (isPrime(count)):
      print count
    count = count + 1

main()