PV of an ordinary annuity

Hi, when you try to commute the PV of an ordinary annuity, why do you have to set FV as 0? You don’t need to set PV as 0 when you commute the FV of an ordinary annuity.

I don’t think you need to consider the FV as 0. I can only talk about the TI calculator, but if you think of it conceptually, n=# periods, which is really # payments in the case of an annuity. The whole purpose of the annuity is to receive x number of payments and paying something on day 1. I hope that makes sense.

if you do 2nd clr tvm - you do not need to set FV to 0.