default font awesome icon code example
Example 1: send icon font awesome
<i class="fa fa-paper-plane" aria-hidden="true"></i>
Example 2: add icon font awesome
<i class="fa fa-plus" aria-hidden="true"></i>
<i class="fa fa-paper-plane" aria-hidden="true"></i>
<i class="fa fa-plus" aria-hidden="true"></i>