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→Extended Regular Expressions
Can be used with grouping to match a variety of character(s), words or phases. The | symbol is used to separate the variety of character(s).
Examples of how to use these complex regular expressions with the grep command are displayed below:<br><br>
<table align="left"><tr valign="top"><td>[[Image:re-8.png|thumb|right|280px|Example of using '''repetition'''.]]</td><td>[[Image:re-9.png|thumb|right|250px|Example of using '''grouping'''.]]</td><td>[[Image:re-10.png|thumb|right|250px|Example of using '''or condition with grouping'''.]]</td></tr></table>
