The javaScript round method is used to rounds a number to the nearest integer. It can do round up or round down a number. You have to just pass the number as a parameter into the method.
Syntax
Math.round(x)Examples of the JavaScript round method
Let’s do round a number to the nearest integer in js:-
<!DOCTYPE html>
<html>
<body>
<script language="JavaScript">
var num = 98.33668;
var n = Math.round(num);
alert(n);
</script>
</body>
</html> Output:
Round up
Simply automatic will round up integer (number). If the first decimal above and equal the 5.
Math.ceil(1.4)ceil() Method also Round a number upward to its nearest integer:
var num = 98.33;
var n = Math.ceil(num)Round down
Same as round up not need specials instructions. If first decimal is below 5.
<script language="JavaScript">
var num = 98.15;
var n = Math.round(num)
alert(n);
</script> floor() Method also can use to Round a number downward to its nearest integer:
Round to 2 decimals
Math.round(num * 100) / 100Round to 1 decimal
Math.round(num * 10) / 10Round to nearest 10
var number = 33; </code>
<code>console.log(Math.round(number / 10) * 10);Round to 4 decimal places
myNumber.toFixed(4);Q: How to JavaScript round float?
Answer: Use toFixed() function.
(6.688689).toFixed(); // equal to 7
(6.688689).toFixed(1); // equal to 6.7
(6.688689).toFixed(2); // equal to 6.69Read more: JavaScript toFixed() method
Do comment if you have any doubts and suggestion on topic.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version