Question

I am new to regular expression.
I need a regular expression (C#) to match numeric value upto 4 digit before decimal places, and upto 2 digit after decimal places.

Example

It should match the following

  1111   
  1211.12  
  1  
  0  
  0.00  
  1.1    

It should not match following

  11.111  
  11111  
  11111.1  

Answer 1

You could use a simple digit quantifier, with a group to test for the decimal portion of the number.

^\d{1,4}(\.\d{1,2})?$