Sorry to STRONGLY disagree with you 100% but R clearly is a functional language and it might just be that you are unfamiliar with R or have not spent time with R.<p>Weak example is Wikipedia list of Functional Programming Languages list R as one.  <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Functional_programming#R" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Functional_programming#R</a><p>R describes itself as a Functional programming Language:<p>The language syntax has a superficial similarity with C, but the semantics are of the FPL (functional programming language) variety with stronger affinities with Lisp and APL. In particular, it allows “computing on the language”, which in turn makes it possible to write functions that take expressions as input, something that is often useful for statistical modeling and graphics.
<a href="https:&#x2F;&#x2F;cran.r-project.org&#x2F;doc&#x2F;manuals&#x2F;r-release&#x2F;R-lang.html" rel="nofollow">https:&#x2F;&#x2F;cran.r-project.org&#x2F;doc&#x2F;manuals&#x2F;r-release&#x2F;R-lang.html</a><p>Academic Evidence: &quot;The Journal Trends in Functional Programming&quot; also list R as a functional programming language.<p>R is an environment and functional programming language for statistical data analysis and visualization. Largely unknown to the functional programming community, it is popular and influential in many empirical sciences.<p><a href="http:&#x2F;&#x2F;link.springer.com&#x2F;chapter&#x2F;10.1007%2F978-3-642-40447-4_12" rel="nofollow">http:&#x2F;&#x2F;link.springer.com&#x2F;chapter&#x2F;10.1007%2F978-3-642-40447-4...</a><p>The issue might be it isn&#x27;t Haskel so it is not 100% functional but there are more Functional Programming Languages then Haskel.<p>PS This is why so many programs in R are poorly written because people try to force OO into R when they could do things Functional. That is also why my eyes bleed when I see people looping through everything in their R scripts.