Apex supports the following data types.

• A primitive, such as an Integer, Double, Long, Date, Datetime, String, ID, Boolean, among others.
• An sObject, either as a generic sObject or as a specific sObject, such as an Account, Contact, or MyCustomObject__c (you’ll learn more about sObjects in a later unit.)
• A collection, including:
  • A list (or array) of primitives, sObjects, user defined objects, objects created from Apex classes, or collections
  • A set of primitives
  • A map from a primitive to a primitive, sObject, or collection
• A typed list of values, also known as an enum
• User-defined Apex classes
• System-supplied Apex classes