What is a wildcard in regex?

What is a wildcard in regex?

A wildcard in regex is a symbol that represents one or more characters. For example, the dot (.) matches any single character.

Can you give me an example of using a wildcard in a regex pattern?

Sure! The regex pattern 'a.b' will match 'aab', 'acb', 'a1b', etc., where the dot represents any character between 'a' and 'b'.

What about using wildcards for multiple characters?

For multiple characters, you can use '.*'. For example, 'a.*b' matches any string that starts with 'a' and ends with 'b', with anything in between.

Are there any limitations to using wildcards in regex?

Yes, wildcards can lead to unexpected matches if not used carefully. It's important to define your patterns precisely to avoid ambiguity.