This is an example of a library. You may see a list of other libraries used on Rosetta Code at Category:Solutions by Library.
“strfmt” is a string formatting library for the Nim programming language similar to Python’s format. It is easier to use than the basic functions provided by the standard module “strutils”. The standard module “strformat", which provides interpolation, may be more convenient than “strfmt” in many cases, but the latter is very useful when we want to work with a format string.