while loop requires explicit condition, for loop doesn't, why?

Question

In C++ you are allowed to have an empty condition inside the for-loop, for example as in for (;;) or for (int x = 0;; ++x). But you can\'t do

Answer 1

Presumably, it's a side-effect of the fact that each given clause within the for-statement is optional. There's reasons why some for-loops wouldn't need an assignment; there's reasons why some others wouldn't need a condition; there's reasons why still others wouldn't need an increment. Requiring there to be some minimum number of them would be needlessly-added complexity.