I think from time to time we all need a regular expression for displaying numbers with 2 decimals for displaying money of various currencies in the world. This regex should only allow 1 dot or comma as a decimal separator. And only allow positive numbers and the numbers can't begin with a 0.

Goals:

• Both dot and comma can be used as a decimal separator
• The decimal separator can only be once in a number
• Numbers can't begin with a zero
• Only positive numbers allowed