Context-Free Grammar

A context-free grammar is a set of rules used to generate and recognize patterns in structured data, such as programming languages or natural language sentences. It describes how symbols can be combined to form valid constructs, with each rule specifying how a particular symbol can be replaced by a sequence of other symbols. "Context-free" means these rules apply universally, regardless of surrounding symbols, making the grammar predictable and easier to analyze. This concept helps in designing parsers and compilers, ensuring that complex sequences follow a consistent, understandable structure.