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";
A computer network is a group of computers that use a set of common communication protocols over digital interconnections for the purpose of sharing resources located on or provided by the network nodes.