new_contents: # -*- coding: utf-8 -*-
  age = 20
  if age >= 18:
      print 'your age is', age
      print 'adult'
  else:
      print 'your age is', age
      print 'teenager'
  
  age = 3
  if age >= 18:
      print 'adult'
  elif age >= 6:
      print 'teenage'
  else:
      print 'kid'
  
  if 'non null':
      print 'True'
  
  names = ['Michael', 'Bob', 'Tracy']
  for name in names:
      print name
  
  sum1 = 0
  for x in [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]:
      sum1 = sum1 + x;
  print sum1
  
  print range(5)
  
  sum1 = 0
  for x in range(101):
      sum1 = sum1 + x;
  print sum1
  
  sum1 = 0
  n = 99
  while n > 0:
      sum1 = sum1 + n
      n = n - 2
  print sum1
  
  birth = raw_input('birth:')
  if birth < 2000:
      print '00前'
  else:
      print '00后'
  
  birth = int(raw_input('birth:'))
  if birth < 2000:
      print '00前'
  else:
      print '00后'
  
subject: add if_for_while.py