Regular Expression

Basic RegEx Cheat Sheet

Symbol	Name	Meaning	Example	Matches
Literals
(text)	Literal	Matches exact text	cat	"cat"
Wildcards & Classes
.	Dot	Matches any single character	h.t	"hat", "hot"
[ ]	Brackets	List of allowed characters	b[ai]t	"bat", "bit"
[^ ]	Negation	Matches anything NOT in the list	[^a]	Any char except 'a'
Quantifiers
*	Star	0 or more times	go*d	"gd", "god", "good"
+	Plus	1 or more times	go+d	"god", "good"
?	Question	0 or 1 time (Optional)	colou?r	"color", "colour"
Anchors
^	Caret	Start of string	^The	"The end"
$	Dollar	End of string	end$	"The end"
Special Characters
\	Escape	Treats special characters as text	\.	"." (actual dot)
\d	Digit	Any number 0-9	\d\d	"42", "99"
\w	Word	Letter, number, or underscore	\w+	"Hello_1"
\s	Space	Whitespace (space, tab, enter)	A\sB	"A B"