<s>
PLANC	B-Language
(	O
Programming	O
LAnguage	O
for	O
Nd	O
Computers	O
,	O
pronounced	O
as	O
plank	O
)	O
is	O
a	O
high-level	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
Compilers	B-Language
were	O
developed	O
by	O
Norsk	O
Data	O
for	O
several	O
architectures	O
,	O
including	O
the	O
Motorola	B-Device
68000	I-Device
,	O
88000	B-Architecture
,	O
Intel	B-Operating_System
x86	I-Operating_System
,	O
and	O
the	O
Norsk	O
Data	O
Nord-10	B-Device
minicomputers	B-Architecture
and	O
ND-500	B-Device
superminicomputer	B-Device
.	O
</s>
<s>
The	O
language	O
was	O
designed	O
to	O
be	O
cross-platform	B-Operating_System
software	I-Operating_System
.	O
</s>
<s>
It	O
was	O
mainly	O
used	O
internally	O
at	O
Norsk	O
Data	O
for	O
writing	O
high	O
level	O
systems	O
software	O
such	O
as	O
the	O
upper	O
parts	O
of	O
operating	B-General_Concept
systems	I-General_Concept
and	O
compilers	B-Language
.	O
</s>
<s>
PLANC	B-Language
programs	O
are	O
structured	B-Language
into	O
modules	O
and	O
routines	O
.	O
</s>
<s>
A	O
very	O
simple	O
example	O
of	O
a	O
PLANC	B-Language
program	O
is	O
as	O
follows	O
:	O
</s>
<s>
Compile-time	O
initialization	O
of	O
variables	O
,	O
in	O
contrast	O
,	O
evaluates	O
from	O
right	O
to	O
left	O
.	O
</s>
<s>
It	O
shares	O
this	O
direction	O
with	O
Plankalkül	B-Language
,	O
ALGOL	B-Language
60	I-Language
,	O
Mary	B-Language
(	O
another	O
little	O
known	O
language	O
developed	O
in	O
Norway	O
)	O
,	O
and	O
the	O
popular	O
language	O
C	B-Language
.	O
</s>
<s>
As	O
with	O
all	O
high	B-Language
level	I-Language
languages	I-Language
,	O
PLANC	B-Language
uses	O
variables	O
as	O
can	O
be	O
seen	O
in	O
the	O
prior	O
sample	O
,	O
here	O
are	O
the	O
allowed	O
data	O
types	O
within	O
PLANC	B-Language
:	O
</s>
<s>
An	O
enumeration	B-Language
was	O
declared	O
thus	O
:	O
</s>
<s>
This	O
defines	O
an	O
enumeration	B-Language
of	O
the	O
seasons	O
and	O
sets	O
the	O
default	O
value	O
to	O
Summer	O
.	O
</s>
<s>
Array	O
pointers	O
were	O
3-word	O
constructs	O
that	O
included	O
both	O
the	O
base	O
address	O
,	O
the	O
lower	O
bound	O
,	O
and	O
the	O
higher	O
bound	O
of	O
the	O
array	O
;	O
this	O
made	O
it	O
possible	O
to	O
do	O
reliable	O
run-time	O
checking	O
of	O
array	O
boundaries	O
,	O
and	O
made	O
the	O
kind	O
of	O
pointer	O
arithmetic	O
that	O
makes	O
C	B-Language
a	O
more	O
challenging	O
language	O
in	O
which	O
to	O
write	O
.	O
</s>
<s>
PLANC	B-Language
is	O
a	O
language	O
in	O
the	O
Pascal	B-Application
family	O
.	O
</s>
<s>
However	O
,	O
it	O
lacks	O
the	O
generic	O
BEGIN	O
END	O
construct	O
often	O
found	O
in	O
Pascal	B-Application
,	O
instead	O
favoring	O
forms	O
like	O
ROUTINE	O
..	O
ENDROUTINE	O
or	O
DO	O
..	O
ENDDO	O
etc	O
.	O
</s>
<s>
Is	O
similar	O
to	O
a	O
C	B-Language
while	O
(	O
test	O
)	O
{	O
...	O
}	O
loop	O
.	O
</s>
<s>
Is	O
similar	O
to	O
a	O
C	B-Language
do	O
{	O
....	O
}	O
while	O
(	O
test	O
)	O
.	O
</s>
<s>
C	B-Language
would	O
require	O
writing	O
something	O
like	O
while	O
(	O
test1	O
)	O
{	O
....	O
if	O
(	O
!	O
</s>
<s>
Alternatively	O
,	O
a	O
type	O
(	O
enumeration	B-Language
or	O
integer	O
ranged	O
type	O
)	O
can	O
be	O
specified	O
to	O
specify	O
a	O
loop	O
over	O
a	O
range	O
of	O
values	O
or	O
a	O
set	O
to	O
loop	O
over	O
all	O
elements	O
of	O
the	O
set	O
or	O
an	O
array	O
can	O
be	O
specified	O
to	O
loop	O
over	O
an	O
array	O
.	O
</s>
<s>
PLANC	B-Language
had	O
a	O
primitive	O
exception	O
mechanism	O
:	O
a	O
routine	O
could	O
return	O
an	O
exception	O
,	O
which	O
was	O
a	O
16-bit	B-Device
integer	O
value	O
.	O
</s>
