Note 2: Comments
We’ll start writing code in the next lesson, but before doing that I also need to note that Scala uses the same comment style that’s used by Java and other C-style programming languages. So you can write comments in either of these three ways:
// a one-line comment
/*
* a multi-line comment.
* more comment stuff here.
*/
/**
* also a multi-line comment
* with more comment stuff here.
*/
You can also create a one-line comment using this style, but we rarely do because you can just use //:
/* can also do this, but we rarely do */
I’ll use comments with many code examples, so I needed to mention this before we start. For example, one thing I often do is to show the result of a computation after a // comment, such as this:
val a = 1
val b = 2
val c = a + b // c is 3
Exercises
The exercises for this lesson are available here.