how to use prefix in route 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 namespace and prefix

Route::name('admin.')->group(function () {
    Route::get('/users', function () {
        // Route assigned name "admin.users"...
    })->name('users');
});

Example 3: prefix laravel route

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