php if else wordpress

<?php
    if ( is_single() ) {
        // Code to execute if the current page is a single post
        echo 'This is a single post.';
    } elseif ( is_page() ) {
        // Code to execute if the current page is a static page
        echo 'This is a static page.';
    } else {
        // Code to execute if the current page is neither a single post nor a static page
        echo 'This is neither a single post nor a static page.';
    }
?>