Subtract function example

by Joshua Koudys

HTML

<h1>This is a simple header</h1>

CSS

h1 {
    font-size:15px;
    color:#00f;
    text-decoration:underline;
    -webkit-transition-duration:0.2s;
}
h1:hover { 
    opacity:0.2;
}

JavaScript

function sub(a,b) {
    return a - b;
}

document.querySelector("h1").textContent = sub(5,100);