[WordpressPagination]

functions.php

$args = array(
  'post_type' => 'product',
  'posts_per_page' => 12,
  'order'    => 'desc',
  'orderby' => 'date',
  'paged' => (get_query_var('paged') ? get_query_var('paged') : 1)
);
$post_query = new WP_Query($args);

if($post_query->have_posts() ) {
  while($post_query->have_posts() ) {
    $post_query->the_post();
    ?>
      <h2><?php the_title(); ?></h2>
      <?php
    }
  $big = 999999999; // need an unlikely integer
  echo paginate_links( array(
    'base' => str_replace( $big, '%#%', get_pagenum_link( $big ) ),
    'format' => '?paged=%#%',
    'current' => max( 1, get_query_var('paged') ),
    'total' => $post_query->max_num_pages,
    'prev_text' => '<',
    'next_text' => '>'
  ) );
}
wp_reset_postdata();