How did I build a program for compound interest with monthly contributions

Init_Amt = input("Enter initial amount")
Interest_rate = input("Enter the interst rate")
Num_years = input("Number of years")
Monthly_Amount = input("Monthly Amount")

Init_Amt = float(Init_Amt)
Interest_rate = float(Interest_rate)
Num_years = int(Num_years)
Monthly_Amount = float(Monthly_Amount)

PV = Init_Amt
IR = Interest_rate
N = Num_years


N_m = N*12 #in terms of months
M = Monthly_Amount



def compound(PV, N, M, IR):
    for i in range(N):
        PV += (M * 12)
        FV = (PV*(1+IR)**N)
        print(i + FV)




if __name__ == "__main__":
    compound(PV, N, M, IR)