Simple update operation using Trigger - Before

Simple update operation using Trigger - Before

Trigger theTriggerName on Contact(before insert, before update){

    List<Contact> contactsToUpdate = new List<Contact>();

    for(contact cont: Trigger.New){

        if(cont.phone == '' ||  cont.phone == null){

            cont.phone = '1234567890';

        }

        if(cont.email == '' ||  cont.email == null){

            cont.email = 'abcd.efgh@ijkl.com';

        }

        contactsToUpdate.add(cont);

    }    

}