Regex Tester & Validator

This regular expression matches numbers, including integers and decimal numbers, with an optional leading minus sign for negative values. It captures whole numbers like 42 and -7, as well as floating-point numbers like 3.14 and -0.5, but does not match exponents or numbers without a leading digit before the decimal point. The global flag allows it to find all matches in a text, and the multiline flag makes anchors like ^ and $ work per line, but since no anchors are used, it primarily affects line-based searching. It is useful for extracting numeric values from strings, logs, or user input.