Doubt in theory

#1

Inside the bool function when I write a statement like the following

return a>b;

what does this actually mean? How do I read it, to be precise?

#2

The sort function uses the comparator to evaluate whether to swap or not.

You can see this as “what should be the final order of the sequence after sorting?”.

For example ‘a < b’ means “first element should be less than the next”