How to execute Javascript on a WordPress page?

<?php
function enqueue_javascript_for_certain_page() {

    $page_id = 100; // change this to fit your needs

    if ( is_page( $page_id ) ) { // check the page you are on

        wp_enqueue_script(
            'my_script_name', // script handle
            get_template_directory_uri() . '/js/my-js-file.js', // script URI
            array( // your script is dependent on following:
                'jquery',
                'jquery-ui'
            ),
            NULL, // script version (NULL means no version to display in query string)
            true // load script right before </body> tag
        );

    }

}

add_action( 'wp_enqueue_scripts', 'enqueue_javascript_for_certain_page' );