It compiled and it is still wrong

My math gives the wrong answer and there is no error

This page is part of Intro to Java with Greenfoot. It assumes you have reached lesson 2.2. Opening it is not counted against you and is not tracked as progress.

What it actually means

Almost always integer division. When both numbers are whole numbers Java throws the remainder away instead of rounding.

The usual causes

Ranked by how often each one turns out to be the answer. Work down the list.

1. Dividing two ints and expecting a decimal: 7 / 2 gives 3, not 3.5.
2. Storing a decimal result into an int, which truncates it.
3. Expecting Java to round. It does not; it cuts.