How do I determine the value of new altcoins? So, I'm curious about the value of altcoins.

Let's say I were to create an altcoin, and get some people to use it... how would I calculate the value of the coin? Is this determined by exchanges? Or by how much money people give in exchange for X amount of the coin? I'm a bit confused by this. I've tried researching it, but nothing's really helped.

Thanks in advance!
The price is found when offer and bid intersect. Exchanges are platforms that facilitate the management and visibility of these, but less efficient markets work as well. 

The price is what you can get for it in exchange. You cannot dictate the price except by providing your own offers/bids.