Python str (String) Data Type

Python str (string) is a sequence of characters.

>>> symbol = 'AAPL'
>>> type(symbol)
<class 'str'>

You can find a character within a string by indexing. Position starts with zero. Negative numbers start from the end of string.

>>> symbol = 'MSFT'
>>> symbol[0]
'M'
>>> symbol[1]
'S'
>>> symbol[-1]
'T'

You can find string length (number of characters) using the len() function.

>>> len('MSFT')
4
>>> len('PyTut')
5

Strings can be typed with single or double quotes. They are equivalent.

>>> single = 'AAPL'
>>> double = "AAPL"
>>> single == double
True

A string can be empty and still a string.

>>> empty = ''
>>> type(empty)
<class 'str'>