How do I ignore 0 value for price validation using regular expressions?

Question

I have problem with my price validation regular expression.

My pattern does not accept values that I want such as:

101.00
110.00
1000.00
0.50

My pattern accepts values such as:

1.00
1.10
1.11
11.11

Right now, my pattern is ^([1-9]+\.)(\d{2})$.

Desired regexp should not accept 'zero' values like e.g. 0.00 or 0.

Why are you doing this in regex? JS has [`parseFloat()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/parseFloat) which you can use to simply check against zero. — MonkeyZeus, Nov 06 '19 at 13:26
that expression still excepts 0.00, i dont want when user input products price, they can put $0 for example. FYI, this is for price validation where seller can input product price. I don't want user(seller) have the ability to input value just '0' or '0.00)' — Debugger, Nov 06 '19 at 16:27

Kamil Kiełczewski · Answer 1 · 2019-11-06T17:01:10.650

2

Try

/^(?!0.00)(\d+\.)(\d\d)$/

[
  '0','0.00',
  '101.00','110.00','1000.00','0.50',
  '1.00','1.10','1.11','11.11'
].map(x=>
  console.log( x, /^(?!0.00)(\d+\.)(\d\d)$/.test(x) )
);

edited Nov 06 '19 at 17:01

answered Nov 06 '19 at 12:21

Kamil Kiełczewski

53,729
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thanks! but i found another flaw which is, its accepts values such as below: 00.00, 000.00 – Debugger Nov 07 '19 at 08:10
also, is it possible to ignore value IF the price is starting with 0 unless there's a number after decimal points? such as 0101.00 or 01000.00 need to ignore – Debugger Nov 07 '19 at 08:14

score 1 · Answer 2 · answered Nov 14 '19 at 13:54

1

The expression /^(0\.(?!00)|(?!0)\d+\.)\d\d$/ satisfies all your requirements (so far). It seems easier to handle the cases 0.x and y.z as two alternatives.

answered Nov 14 '19 at 13:54

Armali

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How do I ignore 0 value for price validation using regular expressions?

2 Answers2