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! Program to test the PRODUCT intrinsic
program testproduct
implicit none
integer, dimension (3, 3) :: a
integer, dimension (3) :: b
logical, dimension (3, 3) :: m, tr
character(len=12) line
a = reshape ((/1, 2, 3, 4, 5, 6, 7, 8, 9/), (/3, 3/));
b = product (a, 1)
tr = .true.
if (any(b .ne. (/6, 120, 504/))) call abort
write (line, 9000) product(a,1)
if (line .ne. ' 6 120 504') call abort
if (product (a) .ne. 362880) call abort
write (line, 9010) product(a)
if (line .ne. '362880') call abort
m = .true.
m(1, 1) = .false.
m(2, 1) = .false.
b = product (a, 2, m)
if (any(b .ne. (/28, 40, 162/))) call abort
b = product (a, 2, m .and. tr)
if (any(b .ne. (/28, 40, 162/))) call abort
write (line, 9000) product(a, 2, m)
if (line .ne. ' 28 40 162') call abort
if (product (a, mask=m) .ne. 181440) call abort
if (product (a, mask=m .and. tr) .ne. 181440) call abort
write (line, 9010) product(a, mask=m)
if (line .ne. '181440') call abort
9000 format (3I4)
9010 format (I6)
end program
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