Hello world
===========

The obligatory 'hello world' program:

[source,chapel]
.hello_world.lm
----
include::code/hello_world.lm[]
----

We run it with:

[source,bash]
----
/opt/colm/bin/colm hello_world.lm
----

This creates a executable chmod+x file with the same name:


[source,bash]
----
ls -l hello_world
----

----
-rwxr-xr-x 1 peter peter 29848 Nov  2 10:06 /tmp/hello_world
----

When we execute it:

----
./hello_world
----

We'll see:

----
hello world
----

We can strip the file to check if we can reduce the executable.
[source,bash]
----
strip ./hello_world
ls -l hello_world
----

----
-rwxr-xr-x 1 peter peter 10360 Nov  2 10:10 /tmp/hello_world
----

== Deja-vu: python2-python3
TIP: It turns out that print is also a function that can have multiple arguments.

[source,chapel]
.hello_world_ext.lm
----
print( 'hello ', "world\r\n" )
----

We also notice that:
* the quotes can be single and double
* the whitespace is not significant
* the newlines '\n' appear to be '\r\n'