But sometimes you need to find phone numbers, more than one email address, etc. In this case, a simple input into the search bar cannot be dispensed with. Symbol classes that allow you to "transform" a number of simple symbols into a short command come to the rescue here.
This is very convenient if the task is to find lines that contain any number or only letters, or are not empty, which are also sometimes needed. Corresponds Madagascar Email List to one character, which is a number, equivalent to class corresponds to a
the minimum number of repetitions and to infinity. the interval of the number of repetitions. These symbols significantly shorten regular expressions . For example, when checking a bank card number. We know that such a number consists of exactly 16 digits.