erlang notes

erlang is a functional language which used to build massively scalable soft real-time systems.OTP is a group of libiraries which involves distributed database, applications to interface towards other languages, debugging and release handling tools.

Erlang è un linguaggio funzionale

OTP is, in fact, a set of standards and frameworks for building Erlang applications.

Erlang has a powerfull interpreter, liking the shell of most operating systems, that start it only need inputing erl on the operating system’s command interpreter.
the following picture demonstrates the Erlang shell.
we can deal with four operations simply as follows.please remember the operators have priority levels.

1> 1+9*7-2/6.
63.666666666666664
2> (1+9)/2-9.
-4.0
3>

by the way,each expression is followed by . to signal its end.
if you want to terminate a Erlang shell, you can use Control-C combination key.

references

1. https://www.erlang.org/