C++ doesn’t encourage functional programming, but it doesn’t prevent you from doing it, and you retain the power to drop down and apply SIMD intrinsics to hand laid out data backed by memory ...

Functional programming is a significant paradigm shift in the software world over the past 10 years. Slowly but surely, ... C++ offers the ability to opt-in to immutability.

C++ is what Ernst called a “multiple paradigm language,” one able to support multiple programming models. So it supports functional programming as easily as it does as object oriented programming.

The object-oriented paradigm popularized by languages including Java and C++ has slowly given way to a functional programming approach that is advocated by popular Python libraries and JavaScript ...

For example, JavaScript, Lua, and Perl 6 are scripting languages that support functional programming; C++ 11, C# 3+, and Rust are C-like languages that support functional programming; and MATLAB ...

Newer programming languages such as Scala, Go, Julia, Clojure and Rust have many functional attributes, and the latest versions of Java and C++ also offer support for functional constructs.

As Jansen notes, C++ hit a high point in 2003 with a 17.53% share that put it in the top three programming languages. One possible reason for the resurgence in interest in C++ is the arrival of C++20.