how to add a variable in a string code example

Example 1: insert into string python more than one

>>> shepherd = "Mary"
>>> age = 32
>>> stuff_in_string = "Shepherd {} is {} years old.".format(shepherd, age)
>>> print(stuff_in_string)
Shepherd Mary is 32 years old.

Example 2: insert into string python

>>> line = 'Kong Panda'
>>> index = line.find('Panda')
>>> output_line = line[:index] + 'Fu ' + line[index:]
>>> output_line
'Kong Fu Panda'

Example 3: how to add a variable to an string

var str = "ello";
var letter = "h";
str = letter + str;