Magento – Check and Find the Product Type (Simple, Configurable, Grouped, etc.)

<?php
switch ($product->getTypeId()) {
    case Mage_Catalog_Model_Product_Type::TYPE_SIMPLE:
        // Do something
        break;
    case Mage_Catalog_Model_Product_Type::TYPE_BUNDLE:
        // Do something
        break;
    case Mage_Catalog_Model_Product_Type::TYPE_CONFIGURABLE:
        // Do something
        break;
    case Mage_Catalog_Model_Product_Type::TYPE_GROUPED:
        // Do something
        break;
    case Mage_Catalog_Model_Product_Type::TYPE_VIRTUAL:
        // Do something
        break;
}
?>