Why Use Threads?

Before getting into the details of threads and some of the problems you might have in writing multi-threaded programs, let’s first answer a more simple question. Why should you use threads at all?

As it turns out, there are at least two major reasons you should use threads.

Parallelism

The first is simple: parallelism. Imagine you are writing a program that performs operations on very large arrays, for example, adding two large arrays together, or incrementing the value of each ...