esactly like in the question says use SWITCH in the SWITCH create several CASE as many as you need assign some variable to each case so that when a user input "pay code" the programe uses that particular code/case in side each case write formula that computes the payrole. It is simple you just need to know how to use SWITCH, I am guessing that you already have a good knowledge of condition i mean using if... else... Happy coding...