<div>
works for 4 digits but fails for 6
</div>


<div>
^[0-9]{4,6}$ &nbsp; <br />
OR<br />
/^\d{4|6}$/<br />
<br />
would do the work
</div>


^[0-9]{4,6}$  
OR
/^\d{4|6}$/

would do the work

<div>
^[0-9]{4,6}$ &nbsp;allows 5 digits<br />
<br />
it needst to be 4 OR 6
</div>


^[0-9]{4,6}$  allows 5 digits

it needst to be 4 OR 6

<div>
i had a trailing space.... it worked!
</div>


<div>
I hope there would have been slight change in comment<br />
<br />
^[0-9]{4,7}$ <br />
and it would have worked right ?
</div>


I hope there would have been slight change in comment

^[0-9]{4,7}$
and it would have worked right ?

<div>
<div class="content wysiwyg-content">
Hi<br />
<br />
I need a regular expression to validate the user input<br />
it has to be numeric<br />
and it has to be either 4 or 6 digits<br />
<br />
i'm not bothered about someone entering all zeros
</div>
</div>


Hi

I need a regular expression to validate the user input
it has to be numeric
and it has to be either 4 or 6 digits

i'm not bothered about someone entering all zeros

regular expression - 4 OR 6 digits

A regular expression ("regex") is a sequence of characters that define a search pattern, mainly for use in pattern matching with strings, or string matching, i.e. "find and replace"-like operations. Regular expression processors are found in several search engines, search and replace dialogs of several word processors and text editors, and in the command lines of text processing utilities, such as sed and AWK. Many programming languages provide regular expression capabilities, some built-in, for example Perl, JavaScript, Ruby, AWK, and Tcl, and others via a standard library, for example .NET languages, Java, Python and C++ (since C++11). Most other languages offer regular expressions via a library.

Regular Expressions

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).

The successor to Active Server Pages, ASP.NET websites utilize the .NET framework to produce dynamic, data and content-driven web applications and services. ASP.NET code can be written using any .NET supported language. As of 2009, ASP.NET can also apply the Model-View-Controller (MVC) pattern to web applications