LEN |
Description Determines the length of a string or binary object.
Returns Number; length of a string or a binary object.
Category String functions
Function syntax
    Len(string or binary object)
See also ToBinary, Left, Right, Mid
History ColdFusion MX: Changed Unicode support: ColdFusion supports the Java UCS-2 representation of Unicode character values 0-65535. (ColdFusion 5 and earlier releases supported ASCII values 1-255. When calculating a length, some string-processing functions processed the ASCII 0 (NUL) character, but did not process subsequent characters of the string.)
Parameters
Example
    <h3>Len Example</h3>

    <cfif IsDefined("Form.MyText")>
       <!--- If len returns 0 (zero), then show error message. --->
       <cfif Len(FORM.myText)>
          <cfoutput><p>Your string, <strong>"#FORM.myText#"</strong>,
          has <strong>#Len(FORM.myText)#</strong> characters.</cfoutput>
       <cfelse>
          <p style="color: red; font-weight: bold">Please enter a string of more
          than 0 characters.</p>
       </cfif>
    </cfif>

    <form action = "<cfoutput>#CGI.SCRIPT_NAME#</cfoutput>" method="POST">
    <p>Type in some text to see the length of your string.</p>

    <input type = "Text" name = "MyText"><br />
    <input type = "Submit" name="Submit" value = "Count characters"><br>
    </form>

STRING |

A string, the name of a string, or a binary object