Decimal number regular expression, where digit after decimal is optional

by

Use the following:

/^\d*\.?\d*$/
  • ^ – Beginning of the line;
  • \d* – 0 or more digits;
  • \.? – An optional dot (escaped, because in regex, . is a special character);
  • \d* – 0 or more digits (the decimal part);
  • $ – End of the line.

This allows for .5 decimal rather than requiring the leading zero, such as 0.5

More Related Contents:

  1. How can I match “anything up until this sequence of characters” in a regular expression?
  2. Regular expression to match any character being repeated more than 10 times
  3. How can I validate an email address using a regular expression?
  4. Regex Last occurrence?
  5. Difference between \w and \b regular expression meta characters
  6. Regular expression to skip character in capture group
  7. A Regex that will never be matched by anything
  8. RegExp exclusion, looking for a word not followed by another
  9. Regular expression to match characters at beginning of line only
  10. Redirect to other domain but keep typed domain
  11. Regular expression matching
  12. How to use regex in XPath “contains” function
  13. How can I match query string variables with mod_rewrite?
  14. How to use ‘-prune’ option of ‘find’ in sh?
  15. Is it possible to increment numbers using regex substitution?
  16. Regular expressions in a Bash case statement
  17. Regex – how to match everything except a particular pattern
  18. C++0x regex in GCC
  19. MongoDB, performance of query by regular expression on indexed fields
  20. Find numbers after specific text in a string with RegEx
  21. Email validation using regular expression in JSF 2 / PrimeFaces
  22. Regex get domain name from email
  23. Using sed and grep/egrep to search and replace
  24. Regular Expression to exclude set of Keywords
  25. Remove square brackets from a string vector
  26. regex: find one-digit number
  27. Regular Expression – How to find a match within a match?
  28. ElasticSearch and Regex queries
  29. How to validate email id in angularJs using ng-pattern
  30. Regex allow digits and a single dot

Leave a Comment