laravel get and first code example

Example 1: laravel get first record

'First email'
    User::whereEmail($email)->first();
'First Record'
   User::first();

Example 2: laravel eloquent get first

// return first row by id
$user = App\User::where('id',$id)->first();
// or return directly a field
$userId = App\User::where(...)->pluck('id');