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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_words
----
----
-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
* there is no need for a concat operator
* the whitespace is not significant
* the newlines '\n' appear to be '\r\n'
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