regular expression which allow both decimals as well as integers

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Hello everyone,

I need to write a regular expression which will allow numbers like

1.23

and

1

in to the text-box. Decimal point is not the compulsion.

Any suggestion or links are welcome..!!

Posted 23-Jul-12 20:32pm

vaibhav mahajan

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2 solutions

Solution 2

Regular Expression is : ^[0-9]\d{0,9}(\.\d{1,3})?%?$

[0-9] : for integers which allows integers from 0 to 9
d{0,9}: this will take up to 10 digits
\. : for decimal
d{1,3} : for decimal up to three digits

Posted 23-Jul-12 21:02pm

Vedangi

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codeBegin · Accepted Answer · 2012-07-23T20:38:00

Solution 1

A digit in the range 1-9 followed by zero or more other digits:

C#

^[1-9]\d*$

To allow numbers with an optional decimal point followed by digits. A digit in the range 1-9 followed by zero or more other digits then optionally followed by a decimal point followed by at least 1 digit:

C#

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

Simple regular expression for a decimal with a precision of 2[^]
Regular expression to match numbers with or without commas and decimals in text[^]
107 regular expressions[^]

Posted 23-Jul-12 20:38pm

codeBegin

Comments

vaibhav mahajan 24-Jul-12 2:50am

thnks codeBegin..!!

thanhtt90 16-Oct-13 5:07am

Greate solution. Thanks very much :)

Chethan T R 18-Sep-14 9:58am

In WPF app, i have code like this

private void txtZ_PreviewTextInput(object sender, TextCompositionEventArgs e)
{
e.Handled = regex.IsMatch(e.Text);
}

and my regex is Regex regex = new Regex(@"^[1-9]\d*(\.\d+)?$"); same what you have given. But its not taking dot(.) atleat once