Question

#loan calculator...just messing around for practice

cls

$choice = 0
while   ($choice -ne 1){
    [string]$name = read-host "Enter name"
    [double]$amount = read-host "Enter loan amount"
    [double]$apr = $(0.01 * (read-host "Enter APR"))
    [int]$term = read-host "Enter term in months"
    $rate = $apr/12
    $mr = $rate * [math]::pow((1+$rate),$term) / ([math]::pow((1+$rate),$term)-1) * $amount

    write-host "Customer: "$name
    write-host `t"Amount: $"$amount
    write-host `t"Monthly rate: "$("{0:N2}" -f $rate)"%"
    write-host `t"Number of payments: "$term
    write-host `t"Monthly payment: $"$("{0:N2}" -f $mr)
    write-host `t"Amount paid back: $"$("{0:N2}" -f $($mr*$term))
    write-host `t"Interest paid: $"$("{0:N2}" -f $($mr * $term - $amount))

    $choice = read-host "Press 1 to quit or anything else to start over"
}

Answer 1

如果您将APR输入为10，则声明为：

[double]$apr = $(0.01 * (read-host "Enter APR"))

将其设置为0.1。然后你将它除以12得到rate，它会给你0.008333 ...当你用{0:N2}格式化它时，会给0.01。

10％的年度百分比实际上是每月0.83％，不 0.0083％所以我不确定为什么你在结尾之后加上一个“％”字符你把它除以100.试试这个：

write-host `t"Monthly rate: "$("{0:N2}" -f $rate*100)"%"

它应该给你正确的数字（假设PowerShell至少略微直观）。

另外，我总是使用12％进行初始测试，因为它使计算变得更容易。

Answer 2

除了paxdiablo的回答之外，要获得在.NET中以百分比显示的原始数字，请使用P格式说明符，例如：

Write-Host "`tMonthly rate: $('{0:P2}' -f $rate)"

当我输入10时，为什么月率输出显示0.01％？我预计0.1％0r 0.10％

2 个答案: