Regex or Regular Expression is used to specify different patterns and use them to match in a file or command output. Regex provides different predefined characters where
whitespace is one of the. Especially between words whitespaces are used to separate them. We can use the
\s in order to define whitespace.
Regex whitespace matches single whitespace or space.
We can also match multiple whitespaces or spaces by using the
* after the \s .