Functions in programming are a fundamental concept that provide several key benefits: Modularity: By breaking down a program into smaller, manageable functions, it becomes easier to understand, debug, and maintain. Reusability: Functions allow code to be reused across the program, reducing redundancy. Abstraction: Functions can abstract complex operations into a simple function call, making the code easier to read and understand. Testing: Functions can be tested individually, which simplifies the process of testing the overall program.