php - Difference between URL::to and URL::route in laravel -

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what difference between

<a href=" {{ url::route('/account/register') }}" >register 1 </a>

and 

<a href=" {{ url::to('/account/register') }}" >register 2 </a>

i defined routes.php 

route::get('/account/register','registercontroller@create');

when click on 'register 1' got following error 

route [/account/register] not defined.

but when click on 'register 2' ,it goes 

registercontroller@create

url::route gets url named route. in case if name route this:

route::get('/account/register', [     'name' => 'register',      'uses' => 'registercontroller@create' ]);

then able use 

<a href="{{ url::route('register') }}" >register 1</a>

in blade templates.


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