This function returns the number of elements in an array.
length( array )
array: (Any Type Array) The array in which to calculate the number of elements.
Integer
This function does not count null elements.
For example, if used on a null result of a query from the Query Database Smart Service,, the expression fails to evaluate and causes an error. To avoid an error, first check the result set for a null value using the isnull() function before attempting to count the result set using the length() function.
You can experiment with this function in the test box below.
Test Input
length({10, 20, 30}) returns 3
isnull(): Use this function to determine if the process variable or array contains null values.
count(): Use this function to include null elements in the number of elements in a process variable or array.
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