How to find style descriptors and javascript handles?

I am new to php and I have just learned the basics. I delete some stylesheets and scripts in WordPress by using the following code:

function dequeue_scripts () {
wp_dequeue_script (& # 39; handle & # 39;)
}
add_action (& # 39; wp_print_scripts & # 39;; & # 39; dequeue_scripts & # 39;);

My question is how do i know what is the name of the nickname of the script / stylesheet? Where can I find it?

I appreciate all help !! 🙂