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Message: <blockquote data-quote="||~DxxCxxxx~||" data-source="post: 3691342" data-attributes="member: 137393"><p><strong>How do I round-off numbers using JavaScript?</strong></p><p></p><p><img src="http://upload.wikimedia.org/wikipedia/commons/thumb/8/8e/WikiBookTitel_JavaScript.jpg/400px-WikiBookTitel_JavaScript.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px"><strong>It is easy, you can even round numbers off to a certain number of          decimal places.</strong></span></span></p><p></p><p>         <strong><span style="font-family: 'Tahoma'"><span style="font-size: 10px">JavaScript offers the following method:         </span></span><span style="font-family: 'Courier New'"><span style="font-size: 10px"><span style="color: #ff0000">Math.round(x)</span></span></span></strong><span style="font-family: 'Tahoma'"><span style="font-size: 10px"></span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        </span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        </span></span><span style="font-family: 'Courier New'"><span style="font-size: 10px">Math.round(295.9);              // returns 296</span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        Math.round(245.2);     // returns 245</span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        Math.round(-102.58);   // returns -103</span></span><span style="font-family: 'Tahoma'"><span style="font-size: 10px"></span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        </span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        <strong>Here is how you round to specific decimal numbers:</strong></span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        </span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        Use the          </span></span><strong><span style="font-family: 'Courier New'"><span style="font-size: 10px"><span style="color: #ff0000">Math.round()</span></span></span></strong><span style="font-family: 'Tahoma'"><span style="font-size: 10px"> function along with the basic multiply and divide operators          and you can easily round numbers to a specific decimal.</span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        </span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        For example: </span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        </span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        </span></span><span style="font-family: 'Courier New'"><span style="font-size: 10px">var pi = "3.1415926535";</span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        </span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        // Round to tenths</span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        pi = Math.round(pi*10)/10;      // returns 3.14</span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        </span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        // Round to hundredths</span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        pi = Math.round(pi*100)/100;    // returns 3.142</span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        </span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        // Round to Bazillionths</span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        pi = Math.round(pi*infinity)/infinity;   // Just Kidding</span></span><span style="font-family: 'Tahoma'"><span style="font-size: 10px"></span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        </span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        </span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        <strong>This function is very useful when rounding dollar amounts:</strong></span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        </span></span></p><p><span style="font-family: 'Tahoma'"><span style="font-size: 10px">        </span></span><span style="font-family: 'Courier New'"><span style="font-size: 10px">var totalDue = "1003.1415926535";</span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        </span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        // Round to tenths:</span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px">        totalDue = Math.round(totalDue*100)/100;   // returns $1003.14</span></span></p><p><span style="font-family: 'Courier New'"><span style="font-size: 10px"></span></span></p></blockquote><p></p>

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