Strange code, what does it mean?

Question

C++ / C#

I just started learning C++, I came across a strange banner with this code, help me understand what it means?
/*#>+++++++4+[>++++++<-]++++.----.++++.*/

Answer 1

This is a comment

Answer 2

This is a polyglot program that outputs '404' and runs under C, Python, Perl, Ruby, Befunge-93, and Brainf*ck.
https://en.wikipedia.org/wiki/Polyglot_%28computing%29
meta.stackoverflow.com/questions/252184/whats-the-...

Answer 3

The code has nothing to do with C or C++. This is most likely Brainfuck.

Answer 4

Some mutated brainfuck