comparison

i have created a number range in snro called J_1IEXCLOC.

I also have a table called J_1IEXCHDR with a field called EXNUM.

now i have to check whether the current numner of the number range object is equal to the last number updated in the EXNUM field of the table J_1IEXCHDR.

CAN u tell me the coding part for it like how to do it?