How to jump to the start or the end of visual selection in Vim?

Question

Is there a motion for moving to the start or end of a visual selection?

I know that o while in visual mode alternates between the two, but I need to be able to select precisely the start.

The overall goal is to surround a visually selected area with parentheses.

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Follow-Up:

Based on the comments, I was able to implement this using the following macro. The idea is to:

1. Esc to exit visual mode;
2. `> to go to the end of the previous visual selection;
3. a) to append a closing parentheses;
4. Esc to exit insert mode;
5. `< to go to the start of the previous visual selection;
6. i( to insert an opening parentheses;
7. Esc to exit insert mode again.

For example:

map \q <ESC>`>a)<ESC>`<i(<ESC> 

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Based on another comment, we have an even more concise solution:

map \q c()<ESC>P 

Answer 1

There are two relevant built-in marks holding the positions of the first and last characters of the last visual selection in the current buffer. In order to move the cursor to these marks, use the commands `< and `>, respectively (see :help `> and :help `<).