wp_enqueue script my_javascript_file in the footer

I am trying to place my_javascript_file in the footer. According to the documentation $in_footer is the fifth value and it is a boolean so I have it set to true.
Currently it doesn’t show up anywhere, as far as I can tell from inspecting the code.

Got it to work, it was hidden in a div I forgot to close (oops)

UPDATE added fourth parameter as empty string ' '

FUNCTIONS.PHP FILE

<?php
function load_scripts() {
   wp_enqueue_script('jquery');
   wp_enqueue_script('my_javascript_file', get_template_directory_uri() . '/javascripts/app.js', array('jquery'),' ',true);
}    

add_action('init', 'load_scripts');
/*add_action('wp_footer', 'load_scripts');/*DELETED THIS PART
?>

FOOTER.PHP added wp_footer

</div>
    <!-- Main Row Ends -->
<?php wp_footer(); ?> /*added*/
</body>

</html>

Solutions Collecting From Web of "wp_enqueue script my_javascript_file in the footer"

You have true set in the 4th parameter (version), not the 5th.

wp_enqueue_script(
    'my_javascript_file',                                 //slug
    get_template_directory_uri() . '/javascripts/app.js', //path
    array('jquery'),                                      //dependencies
    false,                                                //version
    true                                                  //footer
);

Also, as someone else mentioned, drop jquery enqueue, you’ve got it as a dependency, you don’t need to enqueue it as well.

One last thing, your function name has a good chance of breaking your site somewhere down the line. load_scripts has a pretty large chance of conflicting with something from the core or from the theme/plugin.