 Hi again. In this lesson we're going to talk about that how to find if string contains just alphabetic characters. Let's define a string, let's call it my string and let's put inside our string words Los Angeles. Let's try to see does our string contains just alphabetic characters. In order to do that we will use isAlpha method and if we call isAlpha method on our string we will get result false because our string Los Angeles has one white space and what white space is not alphabetic character but if we try to remove our white space and let's say Los Angeles but without white space now all characters inside our string are alphabetic and if we try to call our method again we will get as returning value true. Also what will happen if we have a string for example Boston and we have for example some numbers inside it. Let's say that we have number two. Number two is not alphabetic character so in our string my string we will have one non alphabetic character so if we try to see whether is our string whether it contains all characters alphabetic we will see that it's not true because our string contains number two which is not alphabetic character. That's all for this lesson. Thanks for watching. See you in some next lesson. Bye-bye.