my_string = 'this is a string!'
my_string2 = "this is also a string!!!"
# Also , we can use backslash '/' to escape quotes.
this_string = 'Simon\'s skateboard is in the garage.'
print(this_string)

first_word = 'Hello'
second_word = 'There'
print(first_word + second_word) # HelloThere
print(first_word + ' ' + second_word) # Hello There
print(first_word * 5) # HelloHelloHelloHelloHello
print(len(first_word)) # 5
print(first_word[0]) # H
print(first_word[1]) # e

ford_quote = 'Whether you think you can, or you think you can\'t--you\'re right.'
print(ford_quote) # Whether you think you can, or you think you can't--you're right.

coconut_count = "34"
mango_count = "15"
tropical_fruit_count = coconut_count + mango_count
print(tropical_fruit_count) # 3415 (并且 tropical_fruit_count 是字符串)

username = "Kinari"
timestamp = "04:50"
url = "http://petshop.com/pets/mammals/cats"
# TODO: print a log message using the variables above. The message should have the same format as this one: "Yogesh accessed the site http://petshop.com/pets/reptiles/pythons at 16:20."
print(username + ' accessed the site ' + url + ' at ' + timestamp + '.')

given_name = "William"
middle_names = "Bradley"
family_name = "Pitt"
name_length = len(given_name + ' ' + middle_names + ' ' + family_name)
# Now we check to make sure that the name fits within the driving license character limit
driving_license_character_limit = 28
print(name_length <= driving_license_character_limit) # True

my_string = "sebastian thrun"
my_string.islower() # True
my_string.count('a') # 2
my_string.find('a') # 3

my_name = "my name is Joh."
cap = my_name.capitalize()
print(cap) # My name is joh.
ew = my_name.endswith('li')
print(ew) # False
ind = my_name.index('is')
print(ind) # 8