WP Calling jquery in wp theme

/*=======================================
Proper way to enqueue scripts and styles
=======================================*/
function themename_scripts(){
    if( !is_admin() ) {
        wp_enqueue_script('jquery');
        wp_enqueue_script( 'theme_name-bootstrap', get_template_directory_uri() . '/js/bootstrap.min.js', array('jquery') );

        wp_enqueue_style( 'theme_name-style', get_stylesheet_uri() );
        wp_enqueue_style( 'theme_name-custom_style', get_template_directory_uri() . '/css/custom-style.css',  array( 'theme_name-style' ));
    }
    if ( is_singular() ) wp_enqueue_script( 'comment-reply' );  //wordpress comment style
}
add_action( 'wp_enqueue_scripts', 'theme_name_scripts' );