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ListLen
Last update:
May 18, 2026
Description
Determines the number of elements in a list. Integer; the number of elements in a list.
Category
Function syntax
ListLen(list [, delimiters ])
ListLen(list [, delimiters, includeEmptyFields ])See also
ListAppend, ListDeleteAt, ListInsertAt, ListPrepend; Lists in Data types- Developing guide in the Developing ColdFusion Applications
Parameters
Parameter | Description |
list | A list or a variable that contains one. |
delimiters | A string or a variable that contains one. Characters that separate list elements. The default value is comma. If this parameter contains more than one character, ColdFusion processes each occurrence of each character as a delimiter. |
includeEmptyFields | If includeEmptyValues is set to true, all empty values in the list will be considered when computing length. If set to false, the empty list elements are ignored. |
Usage
ColdFusion ignores empty list elements; thus, the list "a,b,c,,,d" has four elements.Here are some examples of ListLen processing:
Statement | Output | Comment |
ListLen('a,b, c,,,d') | 4 | Third element is " c" |
ListLen('a,b, c,,,d',',') | 4 | Fourth element is "d'" |
ListLen('elem_1__elem_2__elem_3') | 1 | |
ListLen('elem*1**elem*2**elem*3') | 1 | |
ListLen('elem_1__elem_2_elem_3','') | 6 | |
| ListLen("1,,3", ",", true) | 3 |
Example
<cfscript>
myList="Tokyo,Bangkok,Jakarta,Manila,Bangalore,Shanghai";
outputLen=ListLen(myList);
WriteOutput(outputLen); // Returns 6
</cfscript>Output
6
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