Data in functional programming is immutable. Functional programming is declarative. Functional programming uses function composition. Functional programming prefers recursion over loops. Let's look at ...

An example of a function in a program is a sum function. Here’s a simple implementation: define a function named sum that takes two arguments. Call it using variables a and b: int a = 5; int b ...

In modern programming, it's uncommon to see functions longer than around 100 lines of code, because by then, there's probably something that should be pulled out and made into its own function.

Chapter 6: Functions and Functional Programming. Substantial programs are broken up into functions for better modularity and ease of maintenance. Python makes it easy to define functions but also ...