A regular expression to match and valid US.S five-digit and nine-digit (zip+4) postal codes.
Regular Expressions that exactly match 4 or 6 digits, which are typically used in Pin Code.
Regular expressions to match negative numbers or negative integers.
A regular expression that matches all valid decimal numbers.
A regular expression that accurately matches the valid SSN (Social Security Number) number.
A regular expression to match valid release, version, and modification numbers (Semantic Versioning X.Y.Z).
A regular expression to match International Mobile Equipment Identity (IMEI).