How to combine two scripts in function.php

I’m a newbie with wordpress

How to combine two scripts in function.php

if have

register_nav_menus( array(
'primary'
=> __( 'Primary Menu', 'sela' ),
'social'
=> __( 'Social Menu', 'sela' ),
) );

and

wp_nav_menu( 
  array(
    'menu' => 'Primary Menu' ,
    'after' => '<span class="navSep">|</span>'
  ));