Difference between r+b and rb+ (or w+b and wb+)

Question

While reading or writing to file in binary mode, what's the difference between putting '+' between 'r'/'w' and 'b' or putting it right after them both?

I searched and i foud that this affects the behavoir of reading/writing to the file but i don't understand what that means...

Answer 1

From the C Standard (7.21.5.3 The fopen function)

r+b or rb+ open binary file for update (reading and writing)

So there is no difference in specifying the mode.

Here are some other equivalent mode specifications

w+b or wb+ truncate to zero length or create binary file for update

w+bx or wb+x create binary file for update

a+b or ab+ append; open or create binary file for update, writing at end-of-file