Floating-point

Numbers only

Minimum number of digits

Specific number of digits only

2-5 digits

^\d{2,5}$

0 and numbers not begin with 0

^(0|[1-9][0-9]*)$

Numbers not begin with 0 and maximum 2 decimals

^([1-9][0-9]*)+(.[0-9]{1,2})?$

Positive or Negative numbers with maximum 2 decimals

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

Positive, Negative numbers and any decimal length

^(\-|\+)?\d+(\.\d+)?$

Numbers with maximum 2 decimals

^[0-9]+(.[0-9]{2})?$

Numbers with 1-5 decimals

^[0-9]+(.[0-9]{1,5})?$

Positive Integer, excluding 0

^[1-9]\d*$

or

^([1-9][0-9]*){1,3}$

or

^\+?[1-9][0-9]*$

Negative Integer, excluding 0

^-[1-9]\d*$

or

^\-[1-9][0-9]*$

Positive Integer

^\d+$

or

^[1-9]\d*|0$

Negative Integer

^-[1-9]\d*|0$

or

^((-\d+)|(0+))$

Positive floating-point

^[1-9]\d*\.\d*|0\.\d*[1-9]\d*$

or

^[1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0$

Negative floating-point

^((-\d+(\.\d+)?)|(0+(\.0+)?))$

or

^-([1-9]\d*\.\d*|0\.\d*[1-9]\d*)$

or

^(-([1-9]\d*\.\d*|0\.\d*[1-9]\d*))|0?\.0+|0$

or

^(-(([0-9]+\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\.[0-9]+)|([0-9]*[1-9][0-9]*)))$

Floating-point

^-?([1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0)$