File: arrays_03_func.f90

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program arrays_03_func
implicit none
integer :: x(10), s, i
do i = 1, size(x)
    x(i) = i
end do
s = mysum(x)
print *, s
if (s /= 55) error stop

contains

    integer function mysum(a) result(r)
    integer, intent(in) :: a(:)
    integer :: i
    r = 0
    do i = 1, size(a)
        r = r + a(i)
    end do
    end function
end