round off value in javascript

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

1+3.5 => +3.0
2-3.5 => -4.0
3
4+3.5 => +3.0 using Math.floor()
5-3.5 => -3.0 using Math.ceil()

1round of

1200 minutes = 3 hour(s) and 20 minute(s).
2