What we just did was not overly complicated--we added numbers, and incremented and printed them. We even concatenated strings with a function object, which was implemented to add up numbers. But for anyone who didn't know lambda expression syntax yet, it might have looked confusing.

So, let's first have a look at all the lambda expression peculiarities:

We can usually omit most of this, which spares us some typing, in the average case. The shortest lambda expression possible is []{}. It accepts no parameters, captures nothing, and essentially does nothing.

So what does the rest mean?