Cummulative process in rtf using set and get variable

Declare varable:
<?xdoxslt:set_variable($_XDOCTX, ‘c1’, 0)?>


Set variable(In for loop to repected loop) :

<?xdoxslt:set_variable($_XDOCTX, ‘c1’, xdoxslt:get_variable($_XDOCTX, ‘c1’) + EHRS_CUM)?>


Get Variable:
<?xdoxslt:get_variable($_XDOCTX, ‘c1’)?>