fmt is the name of a package that includes a variety of functions related to formatting and output to the screen. Bundling code in this way serves 3 purposes:
It reduces the chance of having overlapping names. This keeps our function names short and succinct
It organizes code so that its easier to find code you want to reuse.
It speeds up the compiler by only requiring recompilation of smaller chunks of a program. Although we use the package
fmt, we don't have to recompile it every time we change our program.