SUM(arg1 [; ByEveryN])

The 'arg1' argument must be an array.
ByEveryN is an optional argument - an integer constant, greater or equal to 1.

Returns a scalar value, which is the sum of the elements in the array 'arg1'.
If ByEveryN is supplied, then the function calculates the sum of every N successive elements and the result is an array.

Calculates the sum of all the elements in the input array, or the sum of every N successive elements in the input array.

Example 1:

Expression: SUM( arg1 )

arg1

11

7

3

5

6

1

Result: 33

Example 2:

(sum by every 2 elements)

Expression: SUM( arg1; 2 )

arg1	11	7	3	5	6	1
result	18		8		7

Windows Forms: All Examples\Data Manipulation\Functions\Statistical\Sum of Data Items