A[B-Y]*Z
Rule 7. ONE or More Instances
The character +
in a regular expression
means "match the preceding character one or more times".
For example A+
matches one or more of
character A.
The plus character, used in a regular expression, is called a Kleene plus .
Regular Expression | Matches |
---|---|
A+ | ONE or more 'A' |
[0-9]+ | ONE or more digits |
Consider the regular expression [A-Z]+[aeiou]+[bd]?
Which of the following strings match that RE?
Recall that ?
means to match zero or one.