why use lambda functions code example

Example 1: lambda python

add = lambda a, b : a + b
add(3,6) ## 9

Example 2: lambda in python

#lambda can be also used for adding string 
>>> full_name = lambda first, last: f'Full name: {first.title()} {last.title()}'
>>> full_name('guido', 'van rossum')
'Full name: Guido Van Rossum'

Example 3: why aws lambda is called lambda

In programming, a Lambda expression (or function) is just an anonymous function, i.e., a function with no name.