Detect Floating point input using javascript regular expression

Question

I need to find whether a number inputed by a user is valid
Following cases are valid

 1. `12`  

 2. `12.01`

The following case is invalid:

1. `12.`  // decimal point with no number following

I have written a regular expression like

var decimalValidation = /^[0-9]*(\.?)[0-9]*$/;  
var n = decimalValidation .test(value);

But the problem is that it accepts a value like 12.

see also: http://stackoverflow.com/questions/18082/validate-decimal-numbers-in-javascript-isnumeric — Paul, Oct 30 '14 at 04:58

score 4 · Accepted Answer · edited Oct 30 '14 at 04:51

4

Change your regex like below to match both integer and floating point numbers.

var decimalValidation = /^\d+(?:\.\d+)?$/;

edited Oct 30 '14 at 04:51

Mulan

answered Oct 30 '14 at 04:47

Avinash Raj

score 1 · Answer 2 · answered Jan 26 '16 at 16:09

1

If this was the case, I would use the following as pattern:

var pattern = /^[0-9]+(\.[0-9]+)?$/

I hope this fits in your condition.

answered Jan 26 '16 at 16:09

2 Answers2