Rounding Operations

Ceiling, flooring and rounding are mathematical functions that help with converting floating point numbers to the nearest whole numbers.

1. ceiling - Gives always the next largest whole number. Example: $ceil(2.3) = 3$, $ceil(–2.3) = –2$
2. flooring - Gives always the next smallest whole number. Example: $floor(2.3) = 2$, $floor(–2.3) = –3$
3. rounding - Rounds to the nearest whole number. Example: $round(2.3) = 2$, $round(2.5) = 3$, $round(–2.3) = –2$, $round(–2.5) = –2$

using in programming

These functions are useful in programming problems. In Java, the math class already provides all three methods.