Knowledge Walls
John Peter
Pune, Maharashtra, India
How to round off numbers precision in javascript with Example
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Method to round numbers precision in Javascript 
Matho.round(), Math.ceil(), Math.floor(), Number.prototype.toFixed() methods are used to round off decimal precision in javascript. Example is created below with all above rounding methods of javascript.
Example
var number = 1982.8389;

document.write(Math.round(number)+"<br />");
document.write(Math.ceil(number)+"<br />");
document.write(Math.floor(number)+"<br />");

//Round to two decimal values
document.write(number.toFixed(2)+"<br />");

//Adding zero's to unavailable precision
document.write(number.toFixed(6)+"<br />");

//default is zero
document.write(number.toFixed()+"<br />");

//1983 round to -1 then 1980
//1980 round to -1 then 8 is given 1 to 19 so 2000
document.write(number.toFixed(-2)+"<br />");
Demo & Output 
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