A function calculates a result according to the current value of its inputs. A function has no internal data and is not linked to declared instances. - Returns the number of items in an array
Inputs
ARR : ANY Declared array
Outputs
Q : DINT Total number of items in the array
Remarks
The input must be an array and can have any data type. This function is particularly useful to avoid writing directly the actual size of an array in a program, and thus keep the program independent from the declaration. Example:
FOR i := 1 TO CountOf (MyArray) DO
MyArray[i-1] := 0;
END_FOR;
In FFLD language, the operation is executed only if the input rung (EN) is TRUE. The output rung (ENO) keeps the same value as the input rung.
Examples
| array | return |
|---|---|
| Arr1 [ 0..9 ] | 10 |
| Arr2 [ 0..4 , 0..9 ] | 50 |
ST Language
Q := CountOf (ARR);
FBD Language
FFLD Language
(* The function is executed only if EN is TRUE *)
(* ENO keeps the same value as EN *)
IL Language
Not available
