#!/usr/bin/python

# P2PU - Python Programming 101 - Chapter 6 - Flow Control
# Python for Informatics - Chapter 5 - Iteration
# Exercise 5.2
print '\n# Exercise 5.2\n'
maximum = None
minimum = None
while True:
  number = raw_input('Enter a number: ')
  if number == 'done' : break;
  try:
     number = float(number)
     if maximum == None or maximum < number : maximum = number
     if minimum == None or minimum > number : minimum = number
  except:
     print "Error, please enter a number, or 'done' to finish"
print 'Maximum =', maximum
print 'Minimum =', minimum