why there us not a single method for values to round up there are 2 methods floor and ceil

Question

if value 6.25 we have to round up then its value after dot is 25 so rounded value is 6
And for value 6.75 we have to round up then its value after dot is 75 so rounded value is 7

Answer 1

Math.floor() to round down
Math.ceil() to round up
Math.round() to round to the closest int