An algorithm is a set of instructions or a step-by-step procedure for solving a problem or performing a task. It is a series of logical operations that can be executed by a computer, typically to process or manipulate data. Algorithms can be used for a wide range of purposes, from simple arithmetic operations to complex data analysis and machine learning. They are essential components of computer programs, operating systems, and software applications. Algorithms are often designed to be efficient, scalable, and adaptable to different contexts and inputs. As technology continues to evolve, the development and optimization of algorithms will continue to be a crucial aspect of computer science and engineering.