Home Numbers Regex To Match Positive or Negative Number Regex To Match Positive or Negative Number A regular expression to match a positive or negative integer value. /^-?\d*\.?\d+$/ Click To Copy Matches: 100 -100 0.15 Non-matches: abcd 1,000 See Also: Positive Integer Regular Expression Negative Number Regular Expression Previous Post Regular Expression To Match Morse Code Next Post WordPress Shortcode Regular Expression More Like This: Regex To Match Whitespaces Between Words Regex To Match Chinese/Japanese/Korean Characters Regex To Match Content Between HTML Tags