Introducing functions
Functions are callable segments of program code that perform one or more statements of related computational work. Functions group statements into a cohesive set of instructions that perform a specific, complex task. This may comprise a single statement, only a few statements, or many statements. Functions can also call other functions. Functions made up of one or more statements, are the next, higher-up, more complex units of program composition. Statements make functions; functions make programs. main() is a function made of statements and other functions.
The process of writing programs – or rather, solving a given problem – with a computer program is primarily the task of breaking the problem down into smaller pieces – into functions – and focusing on the work to be done in each smaller piece. When we break a problem down into smaller parts, we can easily see the essence of the problem. We can focus...
