make regular expression code example

Example 1: regex examples

<.+?>            matches any character one or more times included inside < and >, expanding as needed -> Try it!

Example 2: regex examples

[abc]            matches a string that has either an a or a b or a c -> is the same as a|b|c -> Try it![a-c]            same as previous[a-fA-F0-9]      a string that represents a single hexadecimal digit, case insensitively -> Try it![0-9]%           a string that has a character from 0 to 9 before a % sign[^a-zA-Z]        a string that has not a letter from a to z or from A to Z. In this case the ^ is used as negation of the expression -> Try it!