<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
the	O
term	O
range	O
may	O
refer	O
to	O
one	O
of	O
three	O
things	O
:	O
</s>
<s>
The	O
upper	O
and	O
lower	O
bounds	O
of	O
an	O
array	B-Data_Structure
.	O
</s>
<s>
For	O
example	O
,	O
the	O
range	O
of	O
a	O
signed	B-Algorithm
16-bit	B-Device
integer	O
variable	O
is	O
all	O
the	O
integers	O
from	O
32,768	O
to	O
+	O
32,767	O
.	O
</s>
<s>
When	O
an	O
array	B-Data_Structure
is	O
numerically	O
indexed	O
,	O
its	O
range	O
is	O
the	O
upper	O
and	O
lower	O
bound	O
of	O
the	O
array	B-Data_Structure
.	O
</s>
<s>
Depending	O
on	O
the	O
environment	O
,	O
a	O
warning	O
,	O
a	O
fatal	B-Error_Name
exception	I-Error_Name
,	O
or	O
unpredictable	O
behavior	O
will	O
occur	O
if	O
the	O
program	O
attempts	O
to	O
access	O
an	O
array	B-Data_Structure
element	I-Data_Structure
that	O
is	O
outside	O
the	O
range	O
.	O
</s>
<s>
In	O
some	O
programming	O
languages	O
,	O
such	O
as	O
C	B-Language
,	O
arrays	O
have	O
a	O
fixed	O
lower	O
bound	O
(	O
zero	O
)	O
and	O
will	O
contain	O
data	O
at	O
each	O
position	O
up	O
to	O
the	O
upper	O
bound	O
(	O
so	O
an	O
array	B-Data_Structure
with	O
5	O
elements	O
will	O
have	O
a	O
range	O
of	O
0	O
to	O
4	O
)	O
.	O
</s>
<s>
In	O
others	O
,	O
such	O
as	O
PHP	B-Application
,	O
an	O
array	B-Data_Structure
may	O
have	O
holes	O
where	O
no	O
element	O
is	O
defined	O
,	O
and	O
therefore	O
an	O
array	B-Data_Structure
with	O
a	O
range	O
of	O
0	O
to	O
4	O
will	O
have	O
up	O
to	O
5	O
elements	O
(	O
and	O
a	O
minimum	O
of	O
2	O
)	O
.	O
</s>
<s>
Another	O
meaning	O
of	O
range	O
in	O
computer	B-General_Concept
science	I-General_Concept
is	O
an	O
alternative	O
to	O
iterator	O
.	O
</s>
<s>
In	O
particular	O
,	O
such	O
ranges	O
are	O
supported	O
in	O
C++20	B-Language
,	O
Boost	B-Language
C++	I-Language
Libraries	I-Language
and	O
the	O
D	B-Application
standard	O
library	O
.	O
</s>
