 Hi again, in this lesson we are going to talk about recursive function in Python programming language and we will make a simple example. A recursive function is a function that calls itself. In this example we are going to write a simple function countdown which will count down numbers from provided number as an argument to the number 0. So in this function we will provide as an argument number from which we want to count down to 0, then we will say if our provided number is bigger than 0, then we are going to print that number and we are going to call that exact same function but with argument that is n-1 and this function will be called if our provided argument is bigger than number 0 and this function countdown will call itself until this argument is equals to 0. Ok, now let's call our function countdown and let's count down to from 10 to 0. That's all in this lesson. Thanks for watching. Bye bye.