Allocatable Arrays: dynamic allocation from the heap

Rather than

INTEGER, DIMENSION(1:10) :: numbers ! -- declare both rank and ! bounds (size);

we have

INTEGER, DIMENSION(:), ALLOCATABLE :: numbers ! -- declare only rank;

• dynamically allocated memory (from heap);

    INTEGER                            :: num_to_sort
    INTEGER, DIMENSION(:), ALLOCATABLE :: numbers

    READ(UNIT=*,FTM=*) num_to_sort
    ALLOCATE(numbers(1:num_to_sort))

    !
    ! -- read in values and sort them!
    !