<s>
In	O
computer	O
science	O
,	O
manifest	B-Language
typing	I-Language
is	O
explicit	O
identification	O
by	O
the	O
software	B-Application
programmer	I-Application
of	O
the	O
type	O
of	O
each	O
variable	O
being	O
declared	O
.	O
</s>
<s>
The	O
term	O
"	O
manifest	B-Language
typing	I-Language
"	O
is	O
often	O
used	O
with	O
the	O
term	O
latent	O
typing	O
to	O
describe	O
the	O
difference	O
between	O
the	O
static	B-General_Concept
,	O
compile-time	B-Application
type	O
membership	O
of	O
the	O
object	O
and	O
its	O
run-time	B-Library
type	O
identity	O
.	O
</s>
<s>
type	O
inference	O
)	O
where	O
the	O
type	O
is	O
deduced	O
from	O
context	O
at	O
compile-time	B-Application
or	O
allow	O
for	O
dynamic	O
typing	O
in	O
which	O
the	O
variable	O
is	O
just	O
declared	O
and	O
may	O
be	O
assigned	O
a	O
value	O
of	O
any	O
type	O
at	B-Library
runtime	I-Library
.	O
</s>
<s>
Consider	O
the	O
following	O
example	O
written	O
in	O
the	O
C	B-Language
programming	I-Language
language	I-Language
:	O
</s>
<s>
The	O
type	O
system	O
rejects	O
,	O
at	O
compile-time	B-Application
,	O
such	O
fallacies	O
as	O
trying	O
to	O
add	O
s	O
and	O
x	O
.	O
</s>
<s>
In	O
contrast	O
,	O
in	O
Standard	B-Language
ML	I-Language
,	O
the	O
types	O
do	O
not	O
need	O
to	O
be	O
explicitly	O
declared	O
.	O
</s>
<s>
There	O
are	O
no	O
manifest	B-Language
types	I-Language
in	O
this	O
program	O
,	O
but	O
the	O
compiler	O
still	O
infers	O
the	O
types	O
string	O
,	O
real	O
and	O
int	O
for	O
them	O
,	O
and	O
would	O
reject	O
the	O
expression	O
s+x	O
as	O
a	O
compile-time	B-Application
error	I-Application
.	O
</s>
