 Okay, again, in this lesson, we're going to talk about that how to check if all characters in a string are digits. Let's say that we have string that has all characters inside it as digits. So for example, let's say that our characters are digits 4, 3 and 2, and let's check does our string has all characters that are digits. We'll use method is digit on our string, and if our string contains all characters that are digits, our method is digit will return true. Let's say if we have inside our string some character that is not a digit. For example, let's say that we have decimal point, and let's try to see is all characters in our string are digits. Of course, they are not because we have a decimal point, which is not a digit. And if we try to call same method is digit, we'll get returning value false. That's all for this lesson. Thanks for watching. See you in some next lesson. Bye-bye.