Apex. System.debug( ‘Current User Id – ‘+UserInfo.getUserId());
Visualforce. < apex:page > < h1 >Visualforce Page</ h1 > < p >UserId: {!$User.Id}</ p > < p >User Email: {!$User.Email}</ p > …
Aura Component. let currentUser = $A.get( “$SObjectType.CurrentUser.Id” ); Console.log(currentUser);
Formula Fields. $User.Id.