Change the beginning of the product code whenever we insert a new product

changeProductCode.apxt

trigger changeProductCode on Product2 (before insert) {
	
    list<Product2> productList=trigger.new;
    //newer version of the records
    
    for(Product2 pro : productList)
    {
        if(pro.ProductCode != null && pro.ProductCode != ' ')
        {
            Pro.ProductCode = 'XYZ -' + pro.ProductCode;
        }
    }
}