"How ironic, when you do business you create exceptions to create new opportunities, when you write code (do a job) you handle exceptions to make it clean."
- Pushkar Saraf
Functional programs are expressions. When we say we want to run a functional program, we mean we want to evaluate the expressions. When we evaluate an expression, we get a value. We also know that functional programming is about composing and evaluating expressions. This means that the function signature you write down holds true for each evaluation. But there are scenarios where it's unlikely to happen. Your code might not work as expected and might result in an exceptional behavior. How do we deal with such scenarios, and how do we handle exceptions in functional programming? These are some fundamental questions, and anyone who's starting with functional programming might ask the same. So, in this chapter, we'll try answering these questions, and then we'll move forward...