Mauch回路测试

Question

investment = 10000
for i in range(20):
    yearly_interest = investment *.05
    investment = investment * yearly_interest
investment = round(investment, 2)

嗨，我不太确定这个循环如何给出想要的答案。如果有人能帮助我理解为什么它没有给出答案，以及如何处理它。在Mauch的书中，他们解释说这是一个循环，但它没有返回期望的值（“20年后的值是多少”）

Answer 1

yearly_interest应该添加到investment中，而不是将investment乘以它

investment = 10000
for i in range(20):
    yearly_interest = investment *.05
    investment = investment + yearly_interest
investment = round(investment, 2)