Two arrays, one integer and one real, are used to pass scalar control and input parameters to, and return scalar output from, JTPACK77 routines. In this documentation, these arrays will be referred to as iparm and rparm, but in the host code they can have any valid name.
The iparm and rparm arrays should be dimensioned to _JT_no_of_iparms_ (currently 14) and _JT_no_of_rparms_ (currently 5), respectively.
Defaults can be set by a call to JT_ SETDEFAULTS.
The following description of the elements of iparm and rparm specifies an ``Intent'' for each parameter. This is meant in the Fortran 90 sense. That is, elements denoted ``Intent: In'' are input only, and are not modified. Those denoted ``Intent: Out'' are output only, so their value going into the routine can be arbitrary. Finally, those denoted ``Intent: In/Out'' either may be modified by the routine, or may sometimes be input and sometimes output.