Regular Expression
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Unique Matches
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Groups Found
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Match Details
🔍 Regular Expression Tips
📋 Basic Syntax
- . (dot): Matches any single character except newline
- * (asterisk): Matches 0 or more of the preceding character
- + (plus): Matches 1 or more of the preceding character
- ? (question): Matches 0 or 1 of the preceding character
- ^ (caret): Matches the start of a line
- $ (dollar): Matches the end of a line
🎯 Character Classes
- [abc]: Matches any character in the set
- [^abc]: Matches any character NOT in the set
- [a-z]: Matches any lowercase letter
- [A-Z]: Matches any uppercase letter
- [0-9]: Matches any digit
- \d: Matches any digit (same as [0-9])
- \w: Matches any word character [a-zA-Z0-9_]
- \s: Matches any whitespace character
🚀 Advanced Features
- (group): Creates a capture group
- (?:group): Creates a non-capturing group
- {n}: Matches exactly n occurrences
- {n,m}: Matches between n and m occurrences
- |: OR operator (alternation)
- \b: Word boundary
- (?=...): Positive lookahead
- (?!...): Negative lookahead