Lesson: 21 | Create a trigger that determines if the account name has changed

Apex Trigger

trigger AccountTrigger on Account (before update) {
    for(Account acNew : Trigger.new){
        for(Account acOld : Trigger.old){
            if(acNew.Name !=acOld.Name){
                acNew.Name_is_updated_=true;                    
            }
        }
    }  
}