1//There are meny ways of rounding...
2Math.floor(5.5) //Answer 5, it alwas rounds down.
3Math.round(5.5) //Answer 6, it simpily rounds to the closest whole number.
4Math.ceil(5.5) //Answer 6, it alwas rounds up.
5
6//You can do more things too...
7Math.floor(5.57 * 10) / 10 //Answer 5.5, the number turns into 55.7, Then gets floored (55.0), Then gets divied, (5.5).

1var avg=10.55;
2console.log(Math.round(avg)); //Prints 11

1Math.round(3.14159 * 100) / 100  // 3.14
2
33.14159.toFixed(2);              // 3.14 returns a string
4parseFloat(3.14159.toFixed(2));  // 3.14 returns a number
5

1// rounds the result to the closest integer
2//syntax Math.round(x);
3
4console.log(Math.round(0.9));
5// expected output: 1
6
7console.log(Math.round(5.95), Math.round(5.5), Math.round(5.05));
8// expected output: 6 6 5
9
10console.log(Math.round(-5.05), Math.round(-5.5), Math.round(-5.95));
11// expected output: -5 -5 -6

1let xo =7.45;
2xo = Math.round(xo);
3// output = 7;