 Hi again, in this lesson we're going to talk about that how to check if a string only contains alphanumeric characters. In order to do that let's make a string, let's call it myString and let's put inside it, for example text Los Angeles and let's check if our string only contains alphanumeric characters. So we're going to call this alphanumeric on upon our string and we will get result false because inside of our string we have one white space character and white space character is not a number and it is not a letter. Then let's make a new string, let's call it myString1 and let's put inside it, I don't know, maybe Toronto123, in this word we have characters and we have numbers. So let's check if our string is alphanumeric, we will call upon our myString1 variable method is alphanumeric and we will get result true because all characters inside our string are either numbers or letters. That's all in this lesson, thanks for watching, bye bye.