Square Root of 128
HTML
<div class="well well-sm container">
<button onClick="test()" class="btn btn-primary btn-block">Solve for √128</button>
<p id="test"></p>
</div>
CSS
.well {
margin-top: 10px;
}
p {
font-size: 5em;
text-align: center;
}
JAVASCRIPT
function test() {
document.getElementById("test").innerHTML = Math.sqrt(128);
}
