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The easiest way to do this is look for a number...<br />
<br />
/[1-9]/g<br />
<br />
...and fail out if it returns a result. &nbsp;Anything else is alpha or a character. &nbsp;If you want to match only <i>certain</i> special characters, this may not be the best way.<br />
<br />
You can test the RegEx here: &nbsp;<a href="https://regex101.com/" rel="ugc">https://regex101.com/</a>
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The easiest way to do this is look for a number...

/[1-9]/g

...and fail out if it returns a result.  Anything else is alpha or a character.  If you want to match only certain special characters, this may not be the best way.

You can test the RegEx here:  https://regex101.com/ [https://regex101.com/]

Martin Nguyen

Director, Information Systems

Paul MacDonald

tmajor99

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I need a regular expression that will check a string that contains only ALPH characters (A-Z) and special characters.<br />
<br />
Compliant<br />
---------------<br />
NA &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ---&gt; Match <br />
NA1234 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;----&gt; Not matched because has numbers <br />
UN123 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ----&gt; Not matched because has numbers <br />
23u &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;----&gt; Not matched because has numbers <br />
na &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;-----&gt; Match &nbsp;<br />
N/A &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ------&gt; Match <br />
n-A &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;------&gt; Match
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I need a regular expression that will check a string that contains only ALPH characters (A-Z) and special characters.

Compliant
---------------
NA                     ---> Match 
NA1234            ----> Not matched because has numbers 
UN123             ----> Not matched because has numbers 
23u                  ----> Not matched because has numbers 
na                    -----> Match  
N/A                 ------> Match 
n-A                  ------> Match

Regular Expression to detect if only alpha chars provided

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.