How to apply icons in materialize css?

Question

css

I don’t understand a little how I do it in the documentation, but still the icons are not inserted, who can tell me how to apply them? Here is my example https://jsfiddle.net/rusline/kstjk82m/2/

Answer 1

Where are you connecting the font?
https://jsfiddle.net/4p6ugsgw/