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FORTRAN-80
FORTRAN Concepts
Character
data
is
a string
of
any characters representable in the processor. The blank
character
is
valid
and
significant in a character constant. A character
constant
has
the form
of
a string
of
characters
surrounded
by apostrophes.
An
apostrophe
within
the string
is
represented by a double
apostrophe.
A character constant can have
1-255 characters.
'ARITHMETIC
OVERFLOW
ERROR'
'MURPHY'S
LAW'
For
the sake
of
compatibility with earlier versions
of
FORTRAN,
FORTRAN-80
also supports Hollerith type
data
under the guise
of
arithmetic/logical types. The
Hollerith type
is
summarized in Appendix C.
2.~~~.2~~t3Lellgth.ATeal
v~lu~
alwij.yso¢cupies four
hytesof
memory
(32
hitS).
Atlintegtrm~~pc¢upY?l1e,>~W9,.()rfout
bytes.F?ran
integervariahle, the length is
spe~ifiedw~eT\th,e"ariably,
type is
defined
(section 3.1)
Or
by
default (section F
.2~6).
Jf~ou~rnberpas~jS'specified
[or
an
integer constant, the ,constant
is
assumed to he
deciO}alaT\<lits'l~ngthist~e
s~Ille;asthe
jntegervaria,bIedefault length.,
If
a
number
base
.,is
speci~ied.
for,an.i~teger,,~onstant
(a$,des~rib:d
j~
the, next ,'.subsection).
the
~~n~t~js~~t~rmJned
implicitly
by
the
processor from the base
and
number
of
digits
pftlJeirrteger.
~~~.4.~~~~~e~.~~~~
.•
,<~()r
.~ritliineti9·.·
••
(irlte~~r~r/~~~~)c()nst~~tS'.and
',variables,
th~~(#!il11ql~t),Illp:erb(l$.ei$assll~ed
with.thefollQwi'Q8.e~(;eption~',
·,luteger
••
constants
can;bebinary,()etal~"
or hexadecimal
as
well.
2-5