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.

Mulan · Accepted Answer · 2014-10-30 04:51:22Z

4

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

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

Mulan

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answered Oct 30, 2014 at 4:47

Avinash Raj

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Comments

user5449023 · Accepted Answer · 2016-01-26 16:09:31Z

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, 2016 at 16:09

user5449023