What does the Java assert keyword do, and when should it be used?

Question

What are some real life examples to understand the key role of assertions?

Answer 1

assert is a keyword. It was introduced in JDK 1.4. The are two types of asserts

1. Very simple assert statements
2. Simple assert statements.

By default all assert statements will not be executed. If an assert statement receives false, then it will automatically raise an assertion error.