<s>
Whitespace	B-Language
is	O
an	O
esoteric	O
programming	O
language	O
developed	O
by	O
Edwin	O
Brady	O
and	O
Chris	O
Morris	O
at	O
the	O
University	O
of	O
Durham	O
(	O
also	O
developers	O
of	O
the	O
Kaya	O
and	O
Idris	B-Language
programming	O
languages	O
)	O
.	O
</s>
<s>
Its	O
name	O
is	O
a	O
reference	O
to	O
whitespace	B-Language
characters	O
.	O
</s>
<s>
Unlike	O
most	O
programming	O
languages	O
,	O
which	O
ignore	O
or	O
assign	O
little	O
meaning	O
to	O
most	O
whitespace	B-Language
characters	O
,	O
the	O
Whitespace	B-Language
interpreter	O
ignores	O
any	O
non-whitespace	O
characters	O
.	O
</s>
<s>
A	O
consequence	O
of	O
this	O
property	O
is	O
that	O
a	O
Whitespace	B-Language
program	O
can	O
easily	O
be	O
contained	O
within	O
the	O
whitespace	B-Language
characters	O
of	O
a	O
program	O
written	O
in	O
a	O
language	O
which	O
ignores	O
whitespace	B-Language
,	O
making	O
the	O
text	O
a	O
polyglot	O
.	O
</s>
<s>
The	O
language	O
itself	O
is	O
an	O
imperative	B-Application
stack-based	B-Language
language	I-Language
.	O
</s>
<s>
The	O
virtual	B-Architecture
machine	I-Architecture
on	O
which	O
the	O
programs	O
run	O
has	O
a	O
stack	O
and	O
a	O
heap	B-General_Concept
.	O
</s>
<s>
The	O
programmer	O
is	O
free	O
to	O
push	O
arbitrary-width	O
integers	O
onto	O
the	O
stack	O
(	O
currently	O
there	O
is	O
no	O
implementation	O
of	O
floating	O
point	O
numbers	O
)	O
and	O
can	O
also	O
access	O
the	O
heap	B-General_Concept
as	O
a	O
permanent	O
store	O
for	O
variables	O
and	O
data	B-General_Concept
structures	I-General_Concept
.	O
</s>
<s>
Whitespace	B-Language
was	O
created	O
by	O
Edwin	O
Brady	O
and	O
Chris	O
Morris	O
in	O
2002	O
.	O
</s>
<s>
The	O
idea	O
of	O
using	O
whitespace	B-Language
characters	O
as	O
operators	O
for	O
the	O
C++	B-Language
language	I-Language
had	O
been	O
facetiously	O
suggested	O
five	O
years	O
earlier	O
by	O
Bjarne	O
Stroustrup	O
.	O
</s>
<s>
The	O
table	O
below	O
shows	O
a	O
list	O
of	O
all	O
the	O
IMPs	O
in	O
Whitespace	B-Language
.	O
</s>
<s>
The	O
list	O
of	O
operations	O
supported	O
in	O
Whitespace	B-Language
is	O
:	O
</s>
<s>
The	O
"	O
copy	O
"	O
and	O
"	O
slide	O
"	O
operations	O
were	O
added	O
in	O
Whitespace	B-Language
0.3	O
and	O
may	O
not	O
be	O
supported	O
by	O
all	O
implementations	O
.	O
</s>
<s>
The	O
following	O
is	O
a	O
commented	O
Whitespace	B-Language
program	O
that	O
simply	O
prints	O
"	O
Hello	O
,	O
world	O
!	O
</s>
<s>
Note	O
that	O
when	O
Whitespace	B-Language
source	O
code	O
is	O
displayed	O
in	O
some	O
browsers	O
,	O
the	O
horizontal	O
spacing	O
produced	O
by	O
a	O
tab	O
character	O
is	O
not	O
fixed	O
,	O
but	O
depends	O
on	O
its	O
location	O
in	O
the	O
text	O
relative	O
to	O
the	O
next	O
horizontal	O
tab	O
stop	O
.	O
</s>
