<s>
Ezhil	B-Language
,	O
in	O
Tamil	O
language	O
script	O
(	O
,	O
)	O
,	O
is	O
a	O
compact	O
,	O
open	B-Application
source	I-Application
,	O
interpreted	B-Application
,	O
programming	O
language	O
,	O
originally	O
designed	O
to	O
enable	O
native-Tamil	O
speaking	O
students	O
,	O
K-12	O
age-group	O
to	O
learn	O
computer	B-General_Concept
programming	I-General_Concept
,	O
and	O
enable	O
learning	O
numeracy	O
and	O
computing	O
,	O
outside	O
of	O
linguistic	O
expertise	O
in	O
predominately	O
English	O
language-based	O
computer	O
systems	O
.	O
</s>
<s>
In	O
the	O
Ezhil	B-Language
programming	O
language	O
,	O
Tamil	O
keywords	O
and	O
language-grammar	O
are	O
chosen	O
to	O
easily	O
enable	O
the	O
native	O
Tamil	O
speaker	O
write	O
programs	O
in	O
the	O
Ezhil	B-Language
system	O
.	O
</s>
<s>
Ezhil	B-Language
allows	O
easy	O
representation	O
of	O
computer	O
program	O
closer	O
to	O
the	O
Tamil	O
language	O
logical	O
constructs	O
equivalent	O
to	O
the	O
conditional	B-Language
,	O
branch	O
and	O
loop	O
statements	O
in	O
modern	O
English	O
based	O
programming	O
languages	O
.	O
</s>
<s>
Ezhil	B-Language
is	O
the	O
first	O
freely	O
available	O
programming	O
language	O
in	O
the	O
Tamil	O
language	O
and	O
one	O
of	O
many	O
known	O
non-English-based	B-Language
programming	I-Language
languages	I-Language
.	O
</s>
<s>
The	O
syntax	O
of	O
Ezhil	B-Language
is	O
broadly	O
similar	O
to	O
that	O
of	O
BASIC	O
:	O
blocks	O
of	O
code	O
are	O
run	O
in	O
sequential	O
order	O
,	O
or	O
via	O
functions	O
definitions	O
,	O
in	O
a	O
common	O
control	O
flow	O
structures	O
include	O
while	O
,	O
and	O
if	B-Language
.	O
</s>
<s>
Declarations	O
are	O
not	O
necessary	O
as	O
Ezhil	B-Language
is	O
a	O
dynamic	O
typed	O
language	O
,	O
though	O
type	O
conversions	O
must	O
be	O
made	O
explicitly	O
.	O
</s>
<s>
Ezhil	B-Language
has	O
built-in	O
types	O
for	O
Numbers	O
,	O
Strings	O
,	O
Logicals	O
and	O
Lists	O
.	O
</s>
<s>
Intuitive	O
:	O
Ezhil	B-Language
language	O
syntactic	O
sugar	O
is	O
arranged	O
to	O
allow	O
a	O
sentence	O
structure	O
closer	O
to	O
the	O
head	O
final	O
Tamil	O
language	O
,	O
where	O
the	O
usual	O
word	O
order	O
is	O
SOV	O
,	O
in	O
contrast	O
to	O
the	O
SVO	O
order	O
of	O
English	O
.	O
</s>
<s>
Conditional	B-Language
Statements	O
are	O
modeled	O
after	O
the	O
IF-ELSEIF-ELSE	O
statement	O
.	O
</s>
<s>
Ezhil	B-Language
has	O
four	O
basic	O
types	O
,	O
for	O
Numbers	O
,	O
Strings	O
,	O
Logicals	O
and	O
Lists	O
.	O
</s>
<s>
Standard	O
language	O
grammar	O
for	O
control	O
structures	O
for	O
Ezhil	B-Language
language	O
is	O
given	O
below	O
,	O
</s>
<s>
Ezhil	B-Language
supports	O
only	O
call-by-value	O
,	O
and	O
copies	O
all	O
data	O
structures	O
on	O
function	O
invocations	O
.	O
</s>
<s>
Current	O
Ezhil	B-Language
implementation	O
is	O
tightly	O
integrated	O
with	O
the	O
Python	B-Language
runtime	O
.	O
</s>
<s>
Ezhil	B-Language
interpreter	B-Application
is	O
based	O
on	O
a	O
readline-like	O
CLI	B-Application
,	O
while	O
it	O
can	O
also	O
be	O
run	O
in	O
a	O
batch	O
mode	O
.	O
</s>
<s>
The	O
interactive	O
mode	O
consumes	O
programs	O
as	O
UTF-8	O
encoded	O
text	O
and	O
builds	O
a	O
tree	O
,	O
using	O
a	O
compiler	O
front-end	O
,	O
to	O
build	O
an	O
AST	B-Data_Structure
,	O
and	O
executes	O
it	O
using	O
the	O
Python	B-Language
objects	O
build	O
from	O
this	O
AST	B-Data_Structure
.	O
</s>
<s>
The	O
following	O
is	O
a	O
Hello	O
world	O
program	O
in	O
Ezhil	B-Language
:	O
</s>
<s>
The	O
following	O
is	O
a	O
Turtle	B-Application
graphics	I-Application
based	O
example	O
to	O
draw	O
the	O
Yin-Yang	O
symbols	O
.	O
</s>
<s>
Logo	B-Device
for	O
Ezhil	B-Language
language	O
consists	O
of	O
interlaced	O
letters	O
of	O
the	O
Tamil	O
language	O
script	O
,	O
spelling	O
out	O
Ezhil	B-Language
-	O
A	O
Tamil	O
programming	O
language	O
.	O
</s>
