added erlang related pages

see_also/erl

@@ -0,0 +1 @@
+erlang

see_also/erlang

@@ -0,0 +1 @@
+erl

sheets/_erlang/hello

@@ -0,0 +1,11 @@
+% to install:
+%   sudo apt-get install erlang-ic
+% to compile:
+%   erlc helloworld.erl
+% to run:
+%   erl -noshell -s helloworld hello_world -s init stop
+
+-module(helloworld).
+-export([hello_world/0]).
+
+hello_world() -> io:fwrite("hello, world\n").

sheets/erl

@@ -0,0 +1,10 @@
+# erl
+#
+# Start Erlang runtime system
+
+# Execute compiled BEAM file (helloworld.beam)
+erl -noshell -s helloworld start -s init stop
+
+# Run code from the command line
+erl -noshell -eval 'io:fwrite("Hello, World!\n"), init:stop().'
+

sheets/erlang

@@ -0,0 +1,8 @@
+# Erlang
+# General-purpose, concurrent, functional programming language, as well as a garbage-collected runtime system.
+
+# See also:
+#   erl
+#   Erlang language cheat sheets at /erlang/
+#   list of pages:      /erlang/:list
+#   search in pages:    /erlang/~keyword