How to get access to command-line arguments in Nim?

How can I access command line arguments in Nim?

The documentation shows only how to run the compiled Nim code with command line arguments

nim compile --run greetings.nim arg1 arg2

but I didn't find how to use their values in code.

Here is an example that prints the number of arguments and the first argument:

import std/os

echo paramCount(), " ", paramStr(1)