Regex Cheatsheet - Regular Expression Quick Reference
Quick reference for regular expression patterns. Character classes, quantifiers, anchors, and common patterns.
Digit Shorthand \d
Character ClassMatches any digit, equivalent to [0-9]
Pattern
\dSyntax
Explanation
\d is a predefined character class matching a single digit. \d+ matches one or more digits.
Examples
\d{3}Matches exactly 3 digits
Matches: 123, 456
\d+Matches one or more digits
Matches: 12345
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