Regular expression for positive decimal number with 0, 1 or 2 decimal places

Question

Please help me make regular expression for positive decimal number with 0, 1 or 2 decimal places. It must allow comma and dot. For example it must allow:

0,0         


        

Answer 1

/^\d+([.,]\d{1,2})?$/

this will properly disallow these "unformatted" numbers .01, 3., etc.

if we have zero decimal place digits we probably as well don't want the decimal separator.