math class in java

1double random = Math.random();
2// chooses random number between 0 and 1 ( * 100 to make it in 100)

1double roundedDown = Math.round(23.445);
2double roundedUp   = Math.round(23.545);
3// rounds up and down from float or double

1double floor = Math.floor(7.343);  // floor = 7.0
2//rounds to the value down to the nearest integer value (returned as double)

1int max = Math.max(10, 20);
2//returns largest of two value in parameter