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POJavascript, weird floating point number endless decimal?
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  1. POJavascript, weird floating point number endless decimal?
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    copied!<p>I need some help with floating point numbers...please!</p> <p>Here's the thing, I have code like below:</p> <pre><code>&lt;script&gt; function add() { document.getElementById("answer").value = parseFloat(document.getElementById("num1").value) + parseFloat(document.getElementById("num2").value); } function subtract() { document.getElementById("answer").value = parseFloat(document.getElementById("num1").value) - parseFloat(document.getElementById("num2").value); } function multiply() { document.getElementById("answer").value = parseFloat(document.getElementById("num1").value) * parseFloat(document.getElementById("num2").value); } function divide() { document.getElementById("answer").value = parseFloat(document.getElementById("num1").value) / parseFloat(document.getElementById("num2").value); } &lt;/script&gt; </code></pre> <p>Sorry it's a bit long! And then the html is pretty simple:</p> <pre><code>&lt;h1&gt;Calculator&lt;/h1&gt; &lt;h3&gt;Enter a value in each box below, then click an operation&lt;/h3&gt; &lt;form id="calculatorForm"&gt; &lt;input id="num1" value="0" type="text"&gt; &lt;input id="num2" value="0" type="text"&gt; &lt;br&gt; &lt;input value="+" onclick="add();" type="button"&gt; &lt;input value="-" onclick="subtract();" type="button"&gt; &lt;input value="*" onclick="multiply();" type="button"&gt; &lt;input value="/" onclick="divide();" type="button"&gt; &lt;br&gt; &lt;input id="answer" value="0" type="text"&gt; &lt;/form&gt; </code></pre> <p>You can pretty much guess what my question is gonna be: when I multiply, divide, or subtract two floating point numbers, I end up with an infinite decimal.</p> <p>I need a quick solution that will round those numbers to two decimal points, and I need it to work later on, because I then need to implement Fahrenheit-to-Celsisus operations afterwards.</p> <p>I don't care how this is done, but it <strong>must</strong> be Javascript. Sorry if this has been answered before, but I really need an answer soon! Thanks!</p> <p>EDIT: <strong>A BIG Thankyou to the helpful people who answered my questions. Thank you!</strong></p>
 

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