Positive number validation in jquery

Question

I have use an expression for validating positive number

^\d*.{0,1}\d+$

when i give input -23 then it check it is negetive but when i give input +23 then showing invalid number.

what is the problem ????

any one can give a solution that With +23 it will return (positive)

Answer 1

^\+?\d*.{0,1}\d+$

Gets you the ability to put a "+" in front of the number.

Answer 2

Have you considered to use anything beside regular expressions?

If you are using the jQuery Validation Plugin you could create a custom validation method using the Validator/addMethod function:

$.validator.addMethod('positiveNumber',
    function (value) { 
        return Number(value) > 0;
    }, 'Enter a positive number.');

---

Edit: Since you want only regular expressions, try this one:

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

Explanation:

• Begin of string (^)
• Optional + sign (\+?)
• The number integer part ([0-9]*)
• An optional dot (\.?)
• Optional floating point part ([0-9]+)
• End of string ($)

Answer 3

If you insist on using a regular expression, please make sure that you also capture numbers with exponents and that you allow numbers of the form .42, which is the same as 0.42.

^+?\d*.?\d+([eE]+?\d+)?$

should to the trick.

Answer 4

ok, try this;

\+?\d*\.?\d+\b