You should specify what language you're using in these types of questions. Here's an example in C++, which is fairly easy to understand, so you should be able to transfer the concept to another language to problem.
int x = 2, y = 1, z = 3, min;
if (x < y && x < z)
min = x;
else if (y < x && y < z)
min = y;
else if (z < x && z < y)
min = z;
else
std::cout << "There is no minimum";
You gave the answer in your question
Answer:
Purpose. Domain names serve to identify Internet resources, such as computers, networks, and services, with a text-based label that is easier to memorize than the numerical addresses used in the Internet protocols.
