A function is a self-contained block of code designed to perform a specific task or calculation. Functions improve program structure by promoting code reuse, reducing redundancy, and making code easier to read, maintain, and debug. Instead of writing the same code repeatedly, a function can be called multiple times with different inputs to produce desired outputs.
Answer:A function in a program groups related instructions into a reusable block, making code easier to read, maintain, and debug while reducing repetition and improving overall organization.