In this article you will learn how to match numbers and number range in Regular expressions. The Regex number range include matching 0 to 9, 1 to 9, 0 to 10, 1 to 10, 1 to 12, 1 to 16 and 1-31, 1-32, 0-99, 0-100, 1-100,1-127, 0-255, 0-999, 1-999, 1-1000 and 1-9999.

Nov 14, 2008 · I need a regular expression pattern to only accept positive whole numbers. It can also accept a single zero. I do not want to accept decimals, negative numbers, or numbers with leading zeros. Any suggestions?

Oct 28, 2024 · Regular expression syntax cheat sheet This page provides an overall cheat sheet of all the capabilities of RegExp syntax by aggregating the content of the articles in the RegExp guide. If you need more information on a specific topic, please follow the link on the corresponding heading to access the full article or head to the guide .

Regex for integer and floating point numbers: ^[+-]?\d*\.\d+$|^[+-]?\d+(\.\d*)?$ A number can start with a period (without leading digits(s)), and a number can end with a period (without trailing digits(s)).

Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/.NET, Rust.

Sep 4, 2009 · The easiest way for this would be to parse the string as a number and look for the number to be in the proper range. To do this with pure regex you need to identify the pattern and write it out: ^(0?[0-9]{1,2}|1[0-7][0-9]|180)$

Generate regular expressions for numeric ranges. Just enter start and end of the range and get a valid regex. Works for both positive and negative numbers.

Nov 6, 2024 · Detailed example of building a regex to match a number in a given range of numbers

RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp). Supports JavaScript & PHP/PCRE RegEx. Results update in real-time as you type. Roll over a match or expression for details. Validate patterns with suites of Tests. Save & share expressions with others. Use Tools to explore your results.

matching numbers that divide by 4 - any number that is 0, 4 or 8 or ends in 00, 04, 08, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76, 80, 84, 88, 92 or 96. This can be shortened. For example, instead of using 20|24|28 we can use 2[048].