Regex pattern for numeric values [closed]
I need an regular expression pattern to only accept positive whole numbers. It can also accept a single zero.
I do not want to accept decimals, negative number and numbers with leading zeros.
Any suggestions?
^(0|[1-9][0-9]*)$
"[1-9][0-9]*|0"
I'd just use "[0-9]+" to represent positive whole numbers.
This will allow decimal numbers (or whole numbers) that don't start with zero:
^(([1-9]*)|(([1-9]*)\.([0-9]*)))$
If you want to allow numbers that start with zero, you can do :
^(([0-9]*)|(([0-9]*)\.([0-9]*)))$
/([1-9][0-9]*)|0/
/^0|[1-9]\d*$/