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PRODUCT — Product of array elementsMultiplies the elements of ARRAY along dimension DIM if
the corresponding element in MASK is TRUE.
Fortran 95 and later
Transformational function
| RESULT = PRODUCT(ARRAY[, MASK]) | 
| RESULT = PRODUCT(ARRAY, DIM[, MASK]) | 
| ARRAY | Shall be an array of type INTEGER,REALorCOMPLEX. | 
| DIM | (Optional) shall be a scalar of type INTEGERwith a value in the range from 1 to n, where n 
equals the rank of ARRAY. | 
| MASK | (Optional) shall be of type LOGICALand either be a scalar or an array of the same shape as ARRAY. | 
The result is of the same type as ARRAY.
If DIM is absent, a scalar with the product 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_product INTEGER :: x(5) = (/ 1, 2, 3, 4 ,5 /) print *, PRODUCT(x) ! all elements, product = 120 print *, PRODUCT(x, MASK=MOD(x, 2)==1) ! odd elements, product = 15 END PROGRAM