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?
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regex
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"
I'd just use "[0-9]+" to represent positive whole numbers.
"[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]*)))$
/^0|[1-9]\d*$/
"[1-9][0-9]*|0"
I'd just use "[0-9]+" to represent positive whole numbers.
/([1-9][0-9]*)|0/
/^0|[1-9]\d*$/
/([1-9][0-9]*)|0/
/([1-9][0-9]*)|0/
/^0|[1-9]\d*$/
Source: Stackoverflow.com