floor : Java Glossary

by Roedy Green ©1996-2009 Canadian Mind Products
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floor

To take a float or double and want the corresponding integer (possibly as a float, double, int or long) there are four basic algorithms you might use: round, ceil, floor or truncate. With floor, numbers are always rounded down to the next lowest integer. Use Math.floor and floored division.

value	floor
-1.6	-2
-1.5	-2
-1.4	-2
+1.4	+1
+1.5	+1
+1.6	+1

ceil
division
floating point
modulus
round
truncate

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