WP Custom Post Type

<?php

// Register Custom Post Type
function themename_custom_post_type() {

    $labels = array(
        'name'                => _x( 'Portfolios', 'Post Type General Name', 'text_domain' ),
        'singular_name'       => _x( 'Portfolio', 'Post Type Singular Name', 'text_domain' ),
        'menu_name'           => __( 'Portfolios', 'text_domain' ),
        'parent_item_colon'   => __( 'Parent Portfolio Item:', 'text_domain' ),
        'all_items'           => __( 'All Portfolio Items', 'text_domain' ),
        'view_item'           => __( 'View Portfolio Item', 'text_domain' ),
        'add_new_item'        => __( 'Add New Portfolio Item', 'text_domain' ),
        'add_new'             => __( 'Add New', 'text_domain' ),
        'edit_item'           => __( 'Edit Portfolio Item', 'text_domain' ),
        'update_item'         => __( 'Update Portfolio Item', 'text_domain' ),
        'search_items'        => __( 'Search Portfolio Item', 'text_domain' ),
        'not_found'           => __( 'Not found', 'text_domain' ),
        'not_found_in_trash'  => __( 'Not found in Trash', 'text_domain' ),
    );
    $rewrite = array(
        'slug'                => 'portfolio',
        'with_front'          => true,
        'pages'               => true,
        'feeds'               => true,
    );
    $args = array(
        'label'               => __( 'portfolio', 'text_domain' ),
        'description'         => __( 'Post Type Description', 'text_domain' ),
        'labels'              => $labels,
        'supports'            => array( 'title', 'editor', 'thumbnail', ),
        'hierarchical'        => false,
        'public'              => true,
        'show_ui'             => true,
        'show_in_menu'        => true,
        'show_in_nav_menus'   => true,
        'show_in_admin_bar'   => true,
        'menu_position'       => 5,
        'menu_icon'           => 'dashicons-slides',
        'can_export'          => true,
        'has_archive'         => true,
        'exclude_from_search' => false,
        'publicly_queryable'  => true,
        'rewrite'             => $rewrite,
        'capability_type'     => 'page',
    );
    register_post_type( 'portfolio', $args );

}

// Hook into the 'init' action
add_action( 'init', 'themename_custom_post_type', 0 );

/***********************************************************************
 To display posts from a specific post type.
***********************************************************************/
$args = array( 'post_type' => 'portfolio', 'posts_per_page' => 10 );
$loop = new WP_Query( $args );

while ( $loop->have_posts() ) : $loop->the_post();
//Your content go here
    the_title();
    echo '<div class="entry-content">';
    the_content();
    echo '</div>';
//End of your content
endwhile;

/***********************************************************************
 Another way to display posts from a specific post type.
***********************************************************************/

    <?php
    global $post;
    $args = array( 'posts_per_page' => -1, 'post_type'=> 'portfolio');
    $myposts = get_posts( $args );
    foreach( $myposts as $post ) : setup_postdata($post); ?>

    <?php $slider_image = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'slider-thumb' ); ?>

    <li data-thumb="<?php echo $slider_image[0]; ?>">
        <?php the_post_thumbnail('slider-larger'); ?>
        <?php the_content(); ?>
    </li>

    <?php endforeach; ?>
?>