pagination inside of a function or shortcode

paginationFunc.php

<?php
 function paginationFunc() {
    $paged = get_query_var( 'paged' ) ? get_query_var( 'paged' ) : 1; // setup pagination
  	$the_query = new WP_Query( array( 
  		'post_type' => 'name_of_post_type', // post type custom or native
  		'orderby' => 'date', // how to order
  		'order' => 'DESC', // order ASC or DESC
  		'paged' => $paged,
  		'posts_per_page' => 2) //pages to show
  	);
  	$data = '<div>';
  	while ( $the_query->have_posts() ) : $the_query->the_post();
  		$data .=  '<div>'.get_the_date('m.d.Y').' &mdash; '.get_the_title().'</div>'; // use get in front of functions to store inside variables
  		$data .=  wpautop(get_the_content()).'</div>';
  	endwhile;
  	$data .= '</div>';
  	
  	$data .= '<nav>';
  	$data .=  '<div>'.get_next_posts_link('Older', $the_query->max_num_pages).'</div>'; //Older Link using max_num_pages
  	$data .=  '<div>'.get_previous_posts_link('Newer', $the_query->max_num_pages).'</div>'; //Newer Link using max_num_pages
  	$data .= "</nav>";
  
  
  	wp_reset_postdata(); // Rest Data
  	return $data; // return the posts and pagination
  }