What is the procedure definition in computer science and how does it impact the overall functionality of a program?

In computer science, a procedure is a set of instructions that perform a specific task. It is a reusable block of code that can be called multiple times within a program. Procedures help organize code, improve readability, and make it easier to maintain and debug programs. They also promote code reusability and modularity, which can enhance the overall functionality and efficiency of a program.