python - Why am I getting the error 'string indices must be integers' in this line of code? -


okay know doesn't tidy, on line 'finalmessage' getting error 'string indices must integers' , need little putting right , understanding why. appreciated :)

startbalance = input("enter start balance - £")  interestrate = input("enter interest rate - %")  startbalance = float(startbalance) interestrate = float(interestrate) interestrate = interestrate/100  totalbalance = startbalance  monthlist = [] interestlist = []  months = 24  print("month     interest      total balance") months in range(0,25):  interest = totalbalance*interestrate/12  totalbalance = totalbalance + interest    if months < 10:      message = " %d         %6.2f          %6.2f" %(months, interest,  totalbalance)   else:    message = " %d        %6.2f          %6.2f" %(months, interest,  totalbalance) print(message) monthlist.append(months) interestlist.append(interest)  endofinput = false  while endofinput == false:   numofmonth = input("enter month see interest , balance - ")   finalmessage = float(numofmonth[monthlist]), float(interest[monthlist]),  float(totalbalance[monthlist])   print(finalmessage)    response = ""   while response != "yes" , response != "no":      response = input("would see month? - ")     if response == "yes":      if response != "yes" , response != "no":        print("invalid input, please enter yes or no")  if response == "no":    endofinput = true  print("thank using program, goodbye :)")

you define monthlist (heh) list here monthlist = [] . try use index here numofmonth[monthlist], predictably fails.

i assume wanted xth month, translate into:

monthlist[numofmonth]

but have wrong indexation here interest[monthlist] , again, assume , meant interestlist[numofmonth]

edit

as pointed out in comments, you'd have convert numofmonth int first numofmonth=int(numofmonth)


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