SUM— Sum of array elements
Adds the elements of ARRAY along dimension DIM if
the corresponding element in MASK is
Fortran 90 and later
|ARRAY||Shall be an array of type |
|DIM||(Optional) shall be a scalar of type
|MASK||(Optional) shall be of type |
The result is of the same type as ARRAY.
If DIM is absent, a scalar with the sum of all elements in ARRAY is returned. Otherwise, an array of rank n-1, where n equals the rank of ARRAY, and a shape similar to that of ARRAY with dimension DIM dropped is returned.
PROGRAM test_sum INTEGER :: x(5) = (/ 1, 2, 3, 4 ,5 /) print *, SUM(x) ! all elements, sum = 15 print *, SUM(x, MASK=MOD(x, 2)==1) ! odd elements, sum = 9 END PROGRAM