the Chomsky hierarchy

The Chomsky Hierarchy is a classification of different types of formal grammars that describe languages. It consists of four levels: 1. **Type 0**: Unrestricted grammars, which can generate any language. 2. **Type 1**: Context-sensitive grammars, where rules depend on context. 3. **Type 2**: Context-free grammars, which generate languages like programming languages. 4. **Type 3**: Regular grammars, the simplest, used in tools like search expressions. Each type is increasingly restricted but more manageable, helping us understand language structure, computation, and the limits of what machines can process.