PowerShell

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Echo "Hello, World!"

function Get-Factorial ($n) {
 if ($n -eq 0) {
 return 1
 }
 $fact = 1
 1..$n | ForEach { $fact *= $_ }
 return $fact
}
foreach ($i in 0..16) {
 echo ("{0}! = {1}" -f $i,(Get-Factorial $i))
}

function Get-Fibonacci ($n) {
 if ($n -le 1) {
 return 1
 }
 return (Get-Fibonacci ($n - 1)) + (Get-Fibonacci ($n - 2))
}
$output = ""
foreach ($i in 0..15) {
 $output += ("{0}, " -f (Get-Fibonacci $i))
}
echo "$output..."