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    <p>You should clean up your code a bit:</p> <ul> <li>Indent everything to make it more readable</li> <li>Remove the <code>&lt;center&gt;</code> and <code>bgcolor="white"</code> parts since they do not add anything - your <code>&lt;center&gt;</code> element is empty, and a page is white by default and <code>bgcolor</code> is deprecated anyway</li> <li>All your JavaScript code should be just in one block, no need for three of them. Also you should put all JavaScript into the head instead of mixing part of it into the body</li> <li>Your code should not work because of your <code>;</code> after the <code>}</code> of <code>if</code>, but since you said it worked partially this probably is not the problem. Be sure not to put <code>;</code>s after <code>if</code> clauses, though.</li> </ul> <p>A working version: <a href="http://jsfiddle.net/pimvdb/2dqSr/" rel="nofollow">http://jsfiddle.net/pimvdb/2dqSr/</a>.</p> <pre><code>var result = 0; // result is 0 at first var meal = +prompt("Number of Items: "); // convert into a number with + var tip = 1.07; if (meal &gt; 0) { var index = 0; while (index &lt; meal) { var price = +prompt("price of the item"); result = result + price; // add price to result index++; // increment index, so that while loop will stop after 'meal' times. // If you set it to 'meal' directly, then 'index' will be equal to // 'meal' after the first iteration, and the while loop will only // run once (after the first iteration 'index &lt; meal' is false). } alert(result * tip); // alert total price * tip } else if (meal == 0) { alert("Number is 0"); } else if (meal &lt; 0) { alert("You entered is negative"); } </code></pre>
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    1. POJavascript loop, sum and output
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    1. COJust have one question... doesn't there have to be a space between the + and prompt in "+prompt"?
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      1. USChris
    2. CO@Chris: Spaces are almost never required in JavaScript, they just enhance readability. Here, the `+` simply means that it is a number. You could also compare it to positive/negative numbers like `-5` and `+5` which you write without a space.
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