Thread: Testing number of digits with Regular Expressions

I have to test a string that must match this pattern: any number of digits, a slash, and two or four digits, but not three (it is a year). So I'm using this boolean expression:

System.Text.RegularExpressions.Regex.IsMatch(texto, "^\d+/\d{2,4}$") And Not System.Text.RegularExpressions.Regex.IsMatch(texto, "^\d+/\d{3}$")

Here is my question: is there a way to test for two or four digits, but not three, in a single RegEx pattern?

Thank you very much!

Use the | (or) operator: (\d{2}|\d{4})

Originally Posted by JohnH

Use the | (or) operator: (\d{2}|\d{4})

Thank you very much!