JQuery: Fill in input fields using a button

Using JQuery to set values in empty input fields via a hints button

by akmiecik

HTML

<p>Formula 1:
    <input type="text" id="test1" value="">
</p>
<p>Formula 2:
    <input type="text" id="test2" value="">
</p>
<p>Formula 3:
    <input type="text" id="test3" value="">
</p>
<p>What the answers to these formulas?</p>
<br>
<button id="btn1">Hint</button>

JavaScript

$("#test1").val("10");