Adding a go back button to the top to the all blog post

Hello Jordan
Thank you for your answer, I just want to know where to put the following code to display it in all post

<button class=”button-back” onclick=”goBack()”>Go Back</button>

<script>
function goBack() {
window.history.back();
}
</script>

Sorry, I dont need the button in all the posts, I need the back button on the menu

ok, I will try to do it and let you know thank you

I found a solution
/*CUSTOM Menu back button*/
add_action( ‘wp_footer’, ‘tompai_back_button’ );
function tompai_back_button(){
?>
<script type = “text/javascript”>
jQuery(document).ready(function(){
jQuery(“#menu-item-3656 a”).attr(‘onclick’, ‘window.history.go(-1);’);
});
</script>
<?php
}
/* END CUSTOM BACK BUTTON*/