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→Complex / Extended Regular Expressions
:'''Single Character:''' <span style="font-family:courier;font-weight:bold;">.</span><br>Represents a single character that can be any type of character.<br>
:'''Character Class:''' <span style="font-family:courier;font-weight:bold;">[ ]</span> , <span style="font-family:courier;font-weight:bold;">[^ ]</span><br>Represents a single character but with restrictions.<br>
:'''Zero or More Occurrence:''' <span style="font-family:courier;font-weight:bold;">*</span><br>Zero or more occurrences of previous character.<br><br>
:Examples of '''complex regular expressions''' are displayed below: