How old u can vote

What does this have to do with women's health and what are you asking?

Moderator's Note: Moved from Women's Health to Government. Please RIP questions in the wrong forum. It is not necessary to respond.

What type of election, what country,

I mean high school kids vote in school elections.
The age to vote in one nation is different from another

When using a site like this it makes sense to browse around a bit to see how the site is used. Had you done so, you might have learned the following:

1) that this site is divided into subject forums and that you should choose a forum that applies to your question
2) that you should be detailed in your question so we know what you are asking
3) that you have to give some context to your question so we know how to answer

To answer your question we need to know what you are voting on and where you are voting.