Question

我正在计算每月支付多少钱以便在12个月内还清贷款。使用10美元作为增量。

Payment = 0
balance = float (1200)
interest = float (0.18)
MonthlyInt = interest/12.0

while balance > 0 :

    Payment = Payment + 10
    month = 0
    while month < 12 and balance > 0:
        IntPay = balance* MonthlyInt
        balance += IntPay
        balance -= Payment
        month += 1
print Payment

正确的答案应该是110，为什么我要60岁？

Answer 1

产生差异的主要因素是：

在再次循环12个月之前，余额应重置为1200
付款应在计算利息前从余额中扣除

一些较小的python东西是：

float()不需要0.18这样的数字，它已经是一个浮动
1200.意味着该号码是一个浮点数，因此不需要float()

然后考虑这些事情：

Payment = 0
interest = 0.18
MonthlyInt = interest/12.0
balance = 1200.

while balance > 0 :

    Payment = Payment + 10
    month = 0
    balance = 1200.
    while month < 12 and balance > 0:
        balance -= Payment
        IntPay = balance* MonthlyInt
        balance += IntPay
        month += 1
print(Payment)

结果为110。

Answer 2

这是另一种方法。我尝试在MIT edx课程中使用Brians示例，并且无法在所有情况下都使用它。

这就是我做到的。

def lowestpayment(x,y):
""" x = total balance due
    y = annual interest rate 
    Returns min payment needed to pay off debt in 1 year
"""
month = 0
balance = x
annualInterestRate = y
payment = 0
while balance > 0 and month <= 12:
    month = 0
    balance = x
    payment += 10
    balance = balance - payment
    monthlyint = balance*annualInterestRate/12
    balance += monthlyint
    month += 1
    if balance+(balance*annualInterestRate/12)*11-payment*12 <= 0:
        return payment


print("Lowest Payment: ",lowestpayment(35,0.25))

Answer 3

问..

<块引用>

编写一个 Python 程序，在适当的提示下输入本金金额、利率和年数。找到简单的兴趣并按以下格式显示所有详细信息：
本金金额：卢比。 __________
利率：____%
年数：____
简单的兴趣：卢比。 __________
到期金额：卢比。 __________

答案::

# for input
p = float (input("ENTER PRINCIPLE AMOUNT : "))
r = float (input("ENTER RATE OF INTEREST : "))
y = float (input("ENTER NUMBER OF YEARS : "))
# SIMPLE INTEREST
si = (p * r * y)/100
# display
print("{0:25}: Rs. {1}".format("Principal Amount", p))
print("{0:25}: {1}".format("Rate Of Interest",r ),"%")
print("{0:25}: {1}".format("Number Of Years",y))
print("{0:25}: Rs. {1}".format("Simple Interest",si))
print("{0:25}: Rs. {1}".format("Maturity Amount",p + si))

Python简单利息计算

3 个答案: