Math.round Examples¶

The general syntax for this method is:

Math.round(number)

This method returns number rounded to the nearest integer value.

Numerical strings can also be evaluated, but should be avoided as a best practice.

1console.log(Math.round(1.33));
2console.log(Math.round(-28.7));
3console.log(Math.round(8.5));
4console.log(Math.round("101.45"));

1
-29
9
101

Math.round also works on arrays, but must be combined with the map array method. The syntax for this is:

arrayName.map(Math.round)

1let numbers = [1.33, 4, 8.5, -15.523, 8.49];
2
3console.log(numbers.map(Math.round));

[ 1, 4, 9, -16, 8 ]