Do groups of prime order have one subgroup?

Question

So let's say that I have a group of order $p$, where p is prime; does that group only have one subgroup?

I've look at the wiki article and it says there's a trivial and actual solution, so can we somewhat say it is only one group that exists.

I apologize if I am misinterpreting this.

Thanks for the time and help.

Answer 1

A group of order $p$ has $2$ subgroups: the trivial subgroup and the entire group.

Answer 2

Hint: By Langrange's Theorem if $H < G$ then $|H|$ divides $p$. As $p$ is prime then we must have $|H| = 1$ or $|H| = p$.

What can you conclude from that?