Regex Exercises

Regex	Description	Regex	Description
*	zero or more repetitions of the preceding character or group	{n}	exactly $ n $ repetitions of the preceding character or group
+	one or more repetitions of the preceding character or group	{n,}	at least $ n $ repetitions of the preceding character or group
?	zero or one repetitions of the preceding character or group	{m,n}	at least $ m $ and at most $ n $ repetitions of the preceding character or group
.	any character	^	start of string
a\|b	a or b	$	end of string
[abc]	match any character in abc	(p)	capture the pattern p and store it somewhere (match group in Python)
[^abc]	anything but an ’a’, ’b’, or ’c’	\d	any digit, same as [0-9]
[a-z]	any letter in the ASCII range of a-z	\s	any space character like \n, \t, \r, \f, or space

Regex	Description	Regex	Description
*	zero or more repetitions of the preceding character or group	{n}	exactly \( n \) repetitions of the preceding character or group
+	one or more repetitions of the preceding character or group	{n,}	at least \( n \) repetitions of the preceding character or group
?	zero or one repetitions of the preceding character or group	{m,n}	at least \( m \) and at most \( n \) repetitions of the preceding character or group
.	any character	^	start of string
a\|b	a or b	$	end of string
[abc]	match any character in abc	(p)	capture the pattern p and store it somewhere (match group in Python)
[^abc]	anything but an ’a’, ’b’, or ’c’	\d	any digit, same as [0-9]
[a-z]	any letter in the ASCII range of a-z	\s	any space character like \n, \t, \r, \f, or space