In [1]:
'AMZN'
Out[1]:
'AMZN'
In [2]:
"AMZN"
Out[2]:
'AMZN'
In [3]:
'AMZN GME'
Out[3]:
'AMZN GME'
In [4]:
"""AMZN
GME"""
Out[4]:
'AMZN\nGME'
In [5]:
symbol = 'AMZN'
n = len(symbol)
print(f'n={n}.')

n=4.
In [6]:
symbol[0]
Out[6]:
'A'
In [7]:
symbol[n-1]
Out[7]:
'N'
In [8]:
symbol[1]
Out[8]:
'M'
In [9]:
symbol[-1]
Out[9]:
'N'
In [10]:
symbol[-2]
Out[10]:
'Z'
In [11]:
symbol[1:3] # excludes symbol[3]
Out[11]:
'MZ'
In [12]:
symbol[1:]
Out[12]:
'MZN'
In [13]:
symbol[:3]
Out[13]:
'AMZ'
In [14]:
symbol[:]
Out[14]:
'AMZN'
In [15]:
symbol[1]
Out[15]:
'M'
In [16]:
symbol[2]
Out[16]:
'Z'
In [17]:
symbol[2] + symbol[1]
Out[17]:
'ZM'
In [18]:
symbol + ' banana'
Out[18]:
'AMZN banana'
In [19]:
symbol + ' banana ' + symbol
Out[19]:
'AMZN banana AMZN'
In [20]:
symbol + 'banana' + symbol
Out[20]:
'AMZNbananaAMZN'
In [21]:
symbol[0] * 3
Out[21]:
'AAA'
In [22]:
symbol * 3
Out[22]:
'AMZNAMZNAMZN'
In [23]:
symbol + ' banana ' + symbol * 3
Out[23]:
'AMZN banana AMZNAMZNAMZN'
In [24]:
(symbol + ' banana ' + symbol) * 3
Out[24]:
'AMZN banana AMZNAMZN banana AMZNAMZN banana AMZN'
In [25]:
'AM' in symbol
Out[25]:
True
In [26]:
'MA' in symbol
Out[26]:
False
In [27]:
symbol.index('Z')
Out[27]:
2
In [28]:
'The cow jumped over the moon.'.index('cow')
Out[28]:
4
In [29]:
# 'n=' + n # uncomment to see error: cannot combine string and integer
In [30]:
'n=' + str(n)
Out[30]:
'n=4'
In [31]:
5
Out[31]:
5
In [32]:
'5'
Out[32]:
'5'
In [33]:
type(5)
Out[33]:
int
In [34]:
type('5')
Out[34]:
str
In [35]:
'n=' + str(5)
Out[35]:
'n=5'
In [36]:
symbol.capitalize()
Out[36]:
'Amzn'
In [37]:
# help(str) # uncomment to see a lot of output
In [38]:
'Go Badgers'.split(' ')
Out[38]:
['Go', 'Badgers']
In [39]:
'Badger,Bucky,junior'.split(',')
Out[39]:
['Badger', 'Bucky', 'junior']
In [40]:
'Badger,Bucky,junior'.split(' ')
Out[40]:
['Badger,Bucky,junior']
In [41]:
'Badger,Bucky,junior'.split('B')
Out[41]:
['', 'adger,', 'ucky,junior']
In [42]:
# symbol[0] = 'B' # uncomment to see error: cannot change immutable string 'AMZN'
In [43]:
symbol = 'BMZN' # but can change variable (symbol) to refer to new string