How to add str in strings code example

Example 1: combine two strings python

>>> orig_string = 'Hello'
>>> orig_string + ', world'
'Hello, world'
>>> orig_string
'Hello'
>>> full_sentence = orig_string + ', world'
>>> full_sentence
'Hello, world'

Example 2: python concatenate strings

print “{0} {1} is {2} years old.” format(fname, lname, age)