PowerShell implementation.

powershell_pi_dir/pi.ps1

@@ -0,0 +1,30 @@
+# PowerShell Pi example.
+# Tested on PowerShell Core 6.1.0 on Ubuntu.
+
+$n = 10000000
+
+if ($args.length -gt 0) {
+  $n = $args[0]
+}
+
+Write-Host "Calculating PI using:"
+Write-Host "  " $n "slices"
+Write-Host "   1 process"
+
+$timer = New-Object System.Diagnostics.Stopwatch
+$timer.Start()
+
+$s = 0.0
+$step = 1.0/$n
+
+for ($i=1; $i -le $n; $i++) {
+	$x = ($i - 0.5) * $step
+	$s = $s + (4.0/(1.0+($x*$x)))
+}
+
+$p = $s * $step
+
+$timer.Stop()
+$elapsed = $timer.ElapsedMilliseconds/1000
+Write-Host "Obtained value of PI:" $p 
+Write-Host "Time taken:" $elapsed "seconds"