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FORMAT Statement
Input
Specifications
The
FORMAT
statement permits you to determine how you want the results of com-
putations to look in the output data and allows you to tell the processor how input
data is to be read from cards, tape, or typewriter. In both instances, you are con-
cerned with the problem of converting data from either its external form (cards,
tape, typewriter) to an internal form (core storage), or from its internal form to
cards, paper tape, or the printed line.
Format:
Example:
"FORMAT (s),
S2, S.l, ..• , Sn)"
where s],
SQ, S.l
and
Sn
are specifications as described below.
4 FORMAT (12/FI0.4, E12.4)
6 FORMAT (12,14)
3 FORMAT (E12.4, 15)
FORMAT
specifications have three forms:
Type
I
F
E
Format
Iw
Fw.d
Ew.d
Description
Fixed point numbers
Floating point numbers
without an exponent
Floating point numbers
with an exponent
where
w is the width of the field (that is, the total number of positions printed
or punched) and d is the number of decimal places as explained in the follow-
ing paragraphs.
All three forms can be used in
FORMAT
statements for both input and output
statements. However, there is a slight difference in the meaning between an input
and an output specification, so they will be described separately. The
FORMAT
statement may be written anywhere in the source program.
An example of card input is used here, but the principles illustrated also apply
to paper tape records and to typed input.
/001461-024621/234561-0123456.18921245
-/ .234567+0512+04
/
I
I
I
I
K
I
M
A
I
8
I
{!
0
110000 0100000 0000000 010000000000 000000000000000000
oocooooooolo
00010 0000000000000
;:i;;i ;
; ;
;' ; ' ;'.
14151611181971
;'7i;'~~;'~~~;'
;'
333435363138:1940414243444546414849$ 515253545556575859606162
6364656661 68691011727314157677781990
1111111
111111111111111111 111111111111 11111 1111111111111
222222 2212212 2122222 222122222222 121222L22222222222 222122222222 21222 2222222222222
333333 3333333 3313333 333313331333 333333333333333333 331313333333 33333 3333333333333
444144 4441444 4441444 444441444444 444144444444444444 444441444444 4444. 4444444444444
55 5 5 5 5 5555555 5555155 555555155555 555515555555555555 555555155551 55555 5555555555555
66661& 6666166 666661& 66666661&666 666666666666666666 666666616666 66666 6666666666666
*
777777 7777777 717;17. 717777777177 777777177777777177
~
777777771777 17 77 7 1777717777177
888888 8 8 8 8 8 8 8 8888888 888888881&1& 888888888888888888 881888888888 88888 8888888888888
'999999 9999999 9999999 999999999991 999999999999999999 999999999999 99999 99q9999999999
t 23456 11910111213
14151611181920
212223142526212829303132
»~.~D~~~~~U"~~a~~~
515253545556515859606162 636465666
sa
69
ro
11
1~
13 14 15 16 77 18 19
8tl
Writing the 1620 FORTRAN Program
35
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