langs a-z

Task/Factorial/PowerShell/factorial-1.psh

@@ -0,0 +1,6 @@
+function Get-Factorial ($x) {
+    if ($x -eq 0) {
+        return 1
+    }
+    return $x * (Get-Factorial ($x - 1))
+}

Task/Factorial/PowerShell/factorial-2.psh

@@ -0,0 +1,9 @@
+function Get-Factorial ($x) {
+    if ($x -eq 0) {
+        return 1
+    } else {
+        $product = 1
+        1..$x | ForEach-Object { $product *= $_ }
+        return $product
+    }
+}

Task/Factorial/PowerShell/factorial-3.psh

@@ -0,0 +1,6 @@
+function Get-Factorial ($x) {
+    if ($x -eq 0) {
+        return 1
+    }
+    return (Invoke-Expression (1..$x -join '*'))
+}