Important Regular Expression

^ -Start of the Expression
$ - End of the Expression
\d -Any Digit
* -Match o or more Occurring
? -End Group
+ -One or More
















1. Decimal


^[0-9]+(\.[0-9]{1,2})?$
^[0-9]+(\.[0-9][0-9]?)?


2. Date
eg. 19/10/2010

^[0-9]{2}\[0-9]{2}\[0-9]{4}$

^(([1-9])|(0[1-9])|(1[0-2]))\-((0[1-9]) |([1-31]))\-((\d{2})|(\d{4}))$

3. Year

 eg. 2012

^d{4}

4. Year 1900-2099

^[19/20]\d{2}$