1. Function ConvertCurrencies
2. {
3.     param (
4.         [Parameter(Mandatory=$true)][Double]$amount,
5.         [switch]$EURUSD,
6.         [switch]$USDEUR,
7.         $rateEURUSD = 1.12,
8.         $rateUSDEUR = 0.9
9.     )
10.     if ($EURUSD -eq $true) {
11.         $conv = $amount * $rateEURUSD
12.         Write-Host "$amount euro(s) = $conv dollar(s)"
13.     } elseif ($USDEUR -eq $true) {
14.         $conv = $amount * $rateUSDEUR
15.         Write-Host "$amount dollar(s) = $conv euro(s)"
16.     } else {
17.         Write-Host "You need to specify the way of exchanging by using -EURUSD or -USDEUR"
18.     }
19. }