String are identified as a contiguous set of characters represented in the quotation marks. Python allows for either pairs of single or double quotes. Strings are immutable sequence data type, i.e each time one makes any changes to a string, completely new string object is created.
a_str = 'Hello World' print(a_str) #output will be whole string. Hello World print(a_str) #output will be first character. H print(a_str[0:5]) #output will be first five characters. Hello