quantifiers used to create patterns that match a variable number of characters at a certain position in the string : Regular Expression « Validation « ASP.NET Tutorial
8. 9. 2. quantifiers used to create patterns that match a variable number of characters at a certain position in the string
?: Zero or one times
*: Zero or more times
+: One or more times
{n}: Exactly n times
{n,}: At least n times
{n,m}: At least n times but no more than m times