Hello.
Why some software moving to functional programming languages like "Erlang" ? Why we can't write a software in C++ like Erlang?
Can you show me some languages like "Erlang" ?


Thank you.

Haskell. Scala and Go to a lesser extent.

I understand that the reason functional languages are popular is because the language design makes it easier to write programs that do more than one thing at once.

Scala is Java based and I guess it is slow . Is Erlang popular? and why it is popular more?

Functional languages allow simpler reasoning about what they do which means it appeals when you care about proving a program correct.

You can use functional ideas in parts of programs in more conventional languages.

Or you can code python and be functional and object oriented at the same time :>

When folks look at the functional-programming model, they're especially looking for "massive scaleability." In other words, to use hundreds or thousands of processors at the same time in the solution of some problem. (e.g. "map/reduce") A functional expression of that problem (and, a problem that can be expressed in a functional way ...) is much more friendly to that approach.

A traditional, procedural, program is all about time, because it is also all about internal state vs. side-effects. A procedure, despite its name, is a procedure, not a function in the mathematical sense. The name, "function," is ordinarily (but incorrectly ...) used because "it [can ...] return a value." But it can, and does, do many other things as well, and to many things other than itself. The "return code," if any, is usually just an indicator.

The functional-programming approach, well, is simply different. It is designed to be different. It is designed differently. As with all other programming tools, it is definitely something (like Prolog ... like R...) that you should make it your business to know something about.