Quantifiers +, *, ? and {n} - The Modern JavaScript Tutorial
Feb 29, 2020 · We can see one common rule in these examples: the more precise is the regular expression – the longer and more complex it is. For instance, for HTML tags we could use a …
Regular expression syntax cheat sheet - JavaScript | MDN
Jul 8, 2025 · This page provides an overall cheat sheet of all the capabilities of RegExp syntax by aggregating the content of the articles in the RegExp guide. If you need more information on a …
Regular Expression to match one or more digits 1-9, one '|', one …
Apr 8, 2011 · I'm new to regular expressions and I need to find a regular expression that matches one or more digits [1-9] only ONE '|' sign, one or more '*' sign and zero or more ',' sign.
regex101: build, test, and debug regex
Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.
Quantifiers in Regular Expressions - .NET | Microsoft Learn
Aug 12, 2022 · Learn about regular expression quantifiers, which specify how many instances of a character, group, or character class must be present in the input to match.
Regex Tutorial: Repetition with Star and Plus - Regular-Expressions…
Oct 29, 2025 · In a regular expression, the asterisk or star causes the preceding token to be matched zero or more times, and the plus one or more times.
RegExr: Learn, Build, & Test RegEx
RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp).
Regex Quantifiers - TutorialsTeacher.com
In regular expressions, quantifiers are metacharacters that specify how many times the previous character or group should be matched. Quantifiers allow you to specify the number of …
Regex Tutorial - How to write Regular Expressions?
Apr 12, 2024 · To match zero or more occurrences of the preceding expression, use the star (*) symbol. To match one or more occurrences of the preceding expression, use the plus (+) symbol.
Basic Regular Expressions: One or More Instances
Basic Regular Expressions: One or More Instances Rule 7. ONE or More Instances The character + in a regular expression means "match the preceding character one or more times". For …