# # SOME EXAMPLES WITH STRINGS:
# print(f'Prefixet f, f-String, formaterar talet 3.1415927 till 3 decimaler:')
# print(f'{3.1415927 :.3f}\n')
# print('Eller till 3 decimals, right placed in 8 positions:')
# print(f'{3.1415927 :8.3f}\n')
# # 
# print("""With so called "triple-quoted strings" a text
# reaches several lines""")
#

# print('\t Gives a tab, while \n gives a line')
# print('\a rings a bell (somewhat irriteting...)\n')
# print("Use end=' '", end='')
# print("if you don't want a new line.", )
# 
# x=2
# print(x, x*2, x+3, x**4, sep=' and also ') # OR sep=', ' OR sep='\n’
# # 
namn = 'Svea Lundmark' # print(type(namn)) gives <class 'str'>
# 
# print('\nA FEW EXAMPLES ON FUNCTIONS WITH STRING PARAMETERS:')
# print('There are', len(namn), 'characters in the string "Svea Lundmark".') 
# print('Make a list of the string "Nils": ', list("Nils")) 
# print('We sort the string: ', sorted(namn)) # returns a sorted list.
# print('After sorting: ', namn)
# print('Largest character:', max(namn))
# 
# print('\nSOME METHODS IN THE STRING-CLASS:') 
# print('The letter a exists', namn.count('a'), 'times.') 
# print('The letter v on position ', namn.index('v')) 
# print('Make all letter lower case:', namn.lower())
# print('The methods do not change the original string:', namn) #
# print('Are are letters upper case?', namn.isupper()) # False. 
# # 
# print('\nSOME OPERATORS ON STRINGS: =, +, *, <, >, in')
# print('First concatenate with the + operator:')
# namn += '–Granstroem' # + operator: concatenating
# print(namn)
# print('Then * operatorn:')
# namn += 2 * ":-)" # * operator
# print(namn)
# # # 
# print('\nTest the operator "in" ')
# not_letters = []
# for b in namn:
#     if not b.isalpha(): # If b not a letter 
#         not_letters.append(b)
# print('Characters that are not letters:', not_letters)