Regular Expression for Integer greater than 0 and less than 11

Question

I am trying to modify this Regex so that you get numbers greater or equals 1 or less than or equals to 10. This Regex allows >= 0 or <= 10.

I have a text field on a form that takes numbers equals or greater than 0 and less than 11. I could use IF's and logical operators, TryParse but I kinda like the Regex.

@"^\d$|^[1][0]$"

Answer 1

You need to modify your regex only a little bit

@"^[1-9]$|^10$"

You don't need the square brackets around single characters and I would use a group around the alternation and change it to

@"^([1-9]|10)$"

See it here on Regexr

Answer 2

The answer is this is not something for which you should use regex. If anything you would use regular expressions to parse out the numbers and then compare them with standard if (num >= 0) etc.

// EDIT: replaced regex with this:
int number;
if (Int32.TryParse(myString, out number)) {
    // do something, like:
    if (number >= 0 || number <= 10) {

    }
}