Removed in Swift 3

Question

In new Swift version, this is removed feature. You can't use ++.
It says: '++' is unavailable: it has been removed in Swift 3.

But, you can replace it with += 1 instead.

Answer 1

There are some reasons for removing this operator:

1- Their expressive advantage is minimal x++ is not much shorter than x += 1.
2- Swift already deviates from C in that the =, += and other assignment-like operations returns Void (for a number of reasons). These operators are inconsistent with that model.
3- Swift has powerful features that eliminate many of the common reasons you'd use ++i in a C-style for loop in other languages, so these are relatively infrequently used in well-written Swift code. These features include the for-in loop, ranges, enumerate, map, etc.
4- Code that actually uses the result value of these operators is often confusing.
5-While Swift has well defined order of evaluation, any code that depended on it (like foo(++a, a++)) would be undesirable even if it was well-defined.
6- These operators are applicable to relatively few types: integer and floating point scalars, and iterator-like concepts. They do not apply to complex numbers, matrices, etc.