Widget Rregister

/*theme widget function.php*/
function jobair_widgets(){
	register_sidebar(array(
	 'name' => __( 'Right Sidebar', 'theme-slug' ),
        'id' => 'right_sidebar',
        'description' => __( 'Right Sidebar.', 'theme-slug' ),
        'before_widget' => '<div class="right_sidebar border">',
        'after_widget' => '</div>',
        'before_title' => '<h2>',
        'after_title' => '</h2>',
    ) );
	

	}

add_action('widgets_init','jobair_widgets');

/*sidebar.php or other file add this code*/
<?php if (! dynamic_sidebar('right_sidebar') ):?>
				
<?php endif; ?>