23. What is lambda expression in Python?

A lambda expression in Python is used for creating an anonymous function. Wherever we need a function, we can also use a lambda expression. We have to use lambda keyword for creating a lambda expression. Syntax of lambda function is as follows: lambda argumentList: expression

E.g. lambda a,b: a+b The above mentioned lambda expression takes two arguments and returns their sum. We can use lambda expression to return a function. A lambda expression can be used to pass a function as an argument in another function.