How to Load Order by ID in Magento 2

magento

$orderId = 1;

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();       

$order = $objectManager->create(‘Magento\Sales\Model\Order’)->load($orderId);               

$totall = $order->getGrandTotal();        

$shippingAddress = $order->getShippingAddress();        

$shippingAddress->getTelephone();         

$shippingAddress->getPostcode();         

$items = $order->getAllItems();         

foreach($items as $i)        {               

            $objectManager->create(‘Magento\Catalog\Model\Product’) ->load($i->getProductId())->getSku();                

            echo “product sku:”.$_product.”<br/>”;       

}