How to implement rounding in js

To round decimals in JavaScript, you can use the toFixed() method. The toFixed() method can round Number to a number with specified decimal places.

To round decimals in JavaScript, you can use the toFixed() method. The toFixed() method can round Number to a number with specified decimal places.

toFixed() method

Convert the number to a string. The result has the specified number of digits after the decimal point:

var num = 5.56789;
var n=num.toFixed(2);

Output result:

5.57

In addition, things like round(), floor(), ceil(), etc. cannot really round, and there are accuracy issues. Next, let’s take a look at how JavaScript’s round() method handles decimals?

round() method

The round() method can round a number to the nearest integer:

Math.round(2.5);

Output result:

3

Note: 2.49 will be rounded to 2, 2.5 will be rounded to 3. Obviously the round() method is not the rounding method we want.

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