how to access routes written in ? in path in laravel code example

Example 1: laravel route namespace and prefix

Route::prefix('admin')->group(function () {
    Route::get('/users', function () {
        // Matches The "/admin/users" URL
    });
});

Example 2: laravel route

Route::get('posts/{post}/comments/{comment}', function ($postId, $commentId) {
    //
});