[我正在跟MIT的python课程简介一起来有效地隔离这段时间,我发现了一些让我感到困惑的地方。
我只发布一段代码,因为我只关注此while循环。如果我在下面运行循环,则会得到159个月的正确答案:
while current_savings < down_payment:
current_savings += monthly_savings + (current_savings*0.04)/12
months += 1
但是如果我运行下一个,它将给我158个月的答案:
while current_savings < down_payment:
current_savings += monthly_savings
current_savings += (current_savings*0.04)/12
months += 1
我对第二个代码字符串为什么要保留一个月感到有些困惑。任何人都可以解释一下如何读取此代码吗?
第一个:
在此current_savings
中的(current_savings*0.04)/12
具有current_savings
的第一个值。
while current_savings < down_payment:
current_savings = current_savings + monthly_savings + (current_savings*0.04)/12
months += 1
第二个:
while current_savings < down_payment:
current_savings = current_savings + monthly_savings
current_savings = current_savings + (current_savings*0.04)/12 //here current_savings in (current_savings*0.04)/12 has changed after the line above
months += 1
我摆脱了+=
,因此变得更合乎逻辑。