Syntactic Sugar I: if and case
Let's learn a few common syntactic variants for conditions and reusable subexpressions.
We'll cover the following...
In the next two lessons, we explore a few more syntax features of Haskell. These features can be considered syntactic sugar – they do not allow us to express anything we could not do with our current repertoire of syntax constructs. However, they allow the expression of certain functions in a more readable way. Most of them make use of Haskell’s layout syntax, i.e., they span several lines and need to be indented appropriately. We start with some variants of conditional expressions and matching.
If-expressions
If-expressions are conditional expressions that have a syntax similar to if-statements in other programming languages. The difference is that they are not statements, but expressions.
An if-expression has the form
if condition then