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a guest Jan 24th, 2019 62 Never
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  1. print('This program will tell you the year you turn 100 years old.')
  2.  
  3. print('\nWhat is your name?')
  4.  
  5. namecheck = 0
  6. while namecheck == 0:
  7.   name = input('Name: ')
  8.   if name.isalpha() and len(name) < 30:
  9.     while True:
  10.       name = name.title()
  11.       yesno = input('Your name is {0}. Is this correct? (Yes/No) '.format(name))
  12.       if yesno.lower() == 'yes':
  13.         namecheck = 1
  14.         break
  15.       elif yesno.lower() == 'no':
  16.         break
  17.       else:
  18.         print('Type "Yes" or "No".')
  19.   if not name.isalpha():
  20.     print('Please only use letters from the Roman alphabet.')
  21.   if len(name) > 30:
  22.     print('Please use less than 30 characters.')
  23.  
  24. import datetime
  25. now = datetime.datetime.now() # current date and time
  26.  
  27. print('\nHow old are you?')
  28.  
  29. agecheck = 0
  30. birthday = 1
  31. while agecheck == 0:
  32.   age = input('Age: ')
  33.   if age.isdigit():
  34.     if birthday == 0: # if computed birthday was wrong, user inputs it
  35.       print('Which year were you born in?')
  36.       while True:
  37.         birthday = input('Year: ')
  38.         if len(birthday) != 4:
  39.             print('Please enter a valid date.')
  40.         if int(age)+int(birthday) == now.year or int(age)+int(birthday)+1 == now.year:
  41.             break
  42.         else:
  43.           print('Your entered age is {0}. This does not make sense with the year you have entered.'.format(age))
  44.     else:
  45.       birthday = now.year-int(age)
  46.     if int(age) > 1: # differentiate between "year old" and "years old"
  47.       year_s = 's'
  48.     else:
  49.       year_s = ''
  50.     while True:
  51.       yesno = input('You are {0} year{1} old and were born in {2}. Is this correct? (Yes/No) '.format(age,year_s,str(birthday)))
  52.       if yesno.lower() == 'yes':
  53.         agecheck = 1
  54.         break
  55.       elif yesno.lower() == 'no':
  56.         print('Please re-enter your age and birthday.')
  57.         birthday = 0
  58.         break
  59.       else:
  60.         print('Type "Yes" or "No".')
  61.   else:
  62.     print('Please only use Roman numerals.')
  63.  
  64. if int(age) < 100:
  65.     turn_100 = int(birthday)+100
  66.     years_until_100 = turn_100-now.year
  67.     print('\n{0}, you are {1} year{2} old.\nIn {3} you will turn 100 years old.\nThis is {4} years away.'.format(name,age,year_s,str(turn_100),str(years_until_100)))
  68. elif int(age) == 100 and now.year-int(birthday) == 100:
  69.     print('{0}, you turned 100 years old this year! Congratulations!'.format(name))
  70. else:
  71.     turn_100 = int(birthday)+100
  72.     years_until_100 = (turn_100-now.year)*-1
  73.     if years_until_100 > 1:
  74.         year_s = 's'
  75.     else:
  76.         year_s = ''
  77.     print('\n{0}, you have already turned 100 years old. This was in {1}, {2} year{3} ago.'.format(name,turn_100,years_until_100,year_s))
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