Variable definitions

Question

Atleast it used to be like this:
int i;
for (i...

Since when is this okay?
for (int i...

Thanks :)

Answer 1

The former was used in C89, the first C standard, as it was the only possible way in old C because variables had to be declared at the top of the block.

The latter one was introduced in I believe C99, a little over 20 years ago, so, a pretty long time already. :)

Answer 2

Gotcha, thanks. I'm old ;D