Regex 2 digits separated by commas, not all required
regex
Solution
^[1-9]\d(?:,[1-9]\d){0,2}$
The first part (`[1-9]\d`) is simply the first number, which has to be present at all times. It consists of a non-zero digit and an arbitrary second digit (`\d`).
What follows is a non-capturing group (`(?:...)`), containing a comma followed by another two-digit number (`,[1-9]\d`), just alike the first one. This group can be repeated between zero and two times (`{0,2}`), so you get either no, one or two sequences of a comma and another number.
You can easily expand the part in the curly braces to allow for more allowed numbers.
Problem
I need a regex for the following input: [2 digits], comma, [two digits], comma, [two digits] The 2 digits cannot start with 0. It is allowed to only enter the first 2 digits. Or to enter the first 2 digits, then a comma en then the next 2 digits. Or to enter the full string as described above. Valid input would be: 10 99 17,56 15,99 10,57,61 32,44,99 Could anyone please help me with this regex? At the moment I have this regex, but it doesn't limit the input to maximum 3 groups of 2 digits: ``` ^\d{2}(?:[,]\d{2})*$ ```