Software functions are specific tasks or operations that a program can perform. They are designed to take input, process it, and produce output. For example, a function in a calculator software might add two numbers together, returning the sum as the result. Functions help organize code, making it easier to read, maintain, and reuse. In programming, functions can be defined by the user or built into the software. They can vary in complexity, from simple tasks like displaying a message to more complex operations like sorting data in a database. By using functions, developers can create modular and efficient applications.