如何在贷款计算器中获得每月分期付款？

Question

我是新来的编码，我不能找出错误在我的作业

请看下面的代码和帮助

#LOAN CALCULATOR ask for help
monthlyPayment = 0
loanAmount=input('please enter the loan amount \n')
##make the returned input a numeric value
float(loanAmount)
interestRate=input('please enter the interest rate \n')
##make the returned input a numeric value
float(interestRate)
numOfpay=input('please enter the number of installments \n')
##make the returned input a numeric value
float(numOfpay)
##monthlypayment = (L*(i*(1+i)**n)/((1+i)**(n)-1))
monthlyPayment= (loanAmount*(interestRate*(1+interestRate)**numOfpay) / ((1+interestRate)**(numOfpay)-1)) 

print(monthlyPayment)

我希望每月分期付款，但我要这个

TypeError: unsupported operand type(s) for +: 'int' and 'str'

Answer 1

当您试图将一个值转换为浮点（或任何数据类型）时，必须将它重新赋给同一个变量

float(loanAmount) 应该是 loanAmount = float(loanAmount)

这将确保它转换了数据类型