Plz explain why a negative value inside a floor acts like ceiling and vice versa

Question

Example..
System.out.print(Math.floor(3.6));
-->3
System.out.print(Math.floor(-3.6));
-->-4 //why not -3?

Answer 1

Math.floor rounds the number you chose to the lower full number.
It is 3 because 3 < 3.6
It is -4 because -4 < -3.6