Length
Returns the number of elements in a list.
The Length action (List) counts the elements in a list. Use it to check whether a list is empty (0), to compute the index of the last element (length โ 1), or to report how many records were processed.
Add the action
In the Process Designer toolbox, open List and pick Length (or type Length in the search box โ make sure you pick the one in the List folder, not the String one).
Inputs and outputs
| Field | Direction | Type | Required | What to put / what you get |
|---|---|---|---|---|
| Input a list of elements | Input | List of any type | Yes | The list to count. |
| Result | Output | Integer | Yes | The number of elements. |
Example
| Input a list of elements | Result |
|---|---|
[1,"a",{"x":1}] | 3 |
[null,null] | 2 (empty elements are counted) |
[] | 0 |
Good to know
- Every element counts, including duplicates and empty (
null) values. - An empty list, or a list variable that has no value, returns
0.