Compiler Construction is the process of creating a program, known as a compiler, that translates code written in a high-level programming language into a lower-level language, such as machine code. This translation allows computers to understand and execute the instructions provided by developers. Compilers play a crucial role in software development, enabling the use of languages like C, Java, and Python. The construction of a compiler typically involves several stages, including lexical analysis, syntax analysis, semantic analysis, and code generation. Each stage processes the source code to ensure it is valid and optimally translated. Understanding these stages helps developers create efficient and effective compilers for various programming languages.