 Did you know that you can use underscores in your numbers in Python programming language? For example, number 1000, you can also write in Python programming language as one underscore followed by three zeros. For example, let's make a variable 1000 with value 1000 and let's do some basic math. For example, let's add to our variable some number and we will get the result of this addition 2017. Also, let's try with some other numbers how to write a million with underscores. We could write it like this and let's do again some basic calculations. For example, population of New York City will be 8.55 times a million. Let's print our result. I've made a mistake. Let's try it again. Population of New York City is about 8 and a half million people. That's all in this lesson. Thanks for watching.