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We have seen that making a for-loop heading modify only one variable, such as k, allows you to separate the loop into two logical parts, which is highly desirable. But that only works if the for-loop heading is the only place where k is modified; if the loop body modifies k then the two parts are no longer logically separable.
In accordance with that, the standards require a variable that is modified in a for-loop heading not to be modified in the loop body. Here is an example of something that you should not do.
for(i = 1; i < n; i++)
{
...
i = n;
...
}
Some programmers do that kind of thing as a way of
breaking out of a for-loop. But if you want to
break out of a for-loop, use a break or
return statement.
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