Data commit

Task/ISBN13-check-digit/PowerShell/isbn13-check-digit.psh

@@ -0,0 +1,38 @@
+function Get-ISBN13 {
+    $codes = (
+        "978-1734314502",
+        "978-1734314509",
+        "978-1788399081",
+        "978-1788399083"
+    )
+
+    foreach ($line in $codes) {
+
+        $sum = $null
+        $codeNoDash = $line.Replace("-","")
+
+        for ($i = 0; $i -lt $codeNoDash.length; $i++) {
+
+            if (($i % 2) -eq 1) {
+
+                $sum += [decimal]$codeNoDash[$i] * 3
+
+            }else {
+
+                $sum += [decimal]$codeNoDash[$i]
+
+            }
+        }
+
+        if (($sum % 10) -eq 0) {
+
+            Write-Host "$line Good"
+
+        }else {
+
+            Write-Host "$line Bad"
+
+        }
+    }
+}
+Get-ISBN13