2.3.5 Input/output statements
Input/output
statements are the means
by
which
data
is submitted to the computer for processing,
and
by
which the results
of
processing are
output
to
the TV screen
or
printer.
2. 3. 5. 1
PRINT
Format
Function
l
PRINT ) 1 variable ) < { ; }
constant .
? expression
!
variable } >
const~t
········
expressiOn
This statement
outputs
the values
of
variables, constants, character strings,
or
expressions
to
the display screen. Values are displayed starting at the cursor's
current location on the screen. (To move the cursor down one line on the screen,
execute the
PRINT statement
without
specifying any variables, constants,
or
ex-
pressions.)
To
simplify key
input
when entering this statement, a question mark (?) may
be typed instead
of
the word PRINT.
Numeric
data
is displayed
by
this statement in one
of
two formats: real
number
format
or
exponential format.
Real number
format
Numeric values in
the
range from I x
w-
8
to
1 x 10
8
are displayed in real
number
format.
-1
.9999
63598757
0.
00000001
··········
··
·········
··
·······
··
··············
·· ··
··1
X 10-B
99999999
Exponential
format
Numbers which cannot be displayed in real
number
format are displayed in
exponential format.
-.
31
41
5E+9
............
..
...............
..
........
..
.......
-0.31415
X
10
9
.
51
3606E-20····
·················
··
···········
··
············ 0.513606 X
10-
20
A plus (
+)
or
minus
(-)
sign
is
always displayed ahead
of
the exponent (the
number
following
"E")
of
a
number
displayed in exponential format.
Some special
methods
of
using the PRINT statement are shown below.
PRINT
"
[!]
"
PRINT
"
III"
PRINT
"
I:I"
PRINT
"
CI"
PRINT
"D "
PRINT
"D "
Clears the entire screen and moves the cursor
to
the
home
position
(the
upper
left corner
of
the
screen).
Moves the cursor
t?
the home position
without
clearing the
screen.
Moves the cursor one column
to
the right.
Moves the cursor one column
to
the left.
Moves the cursor up one line.
Moves the cursor down one line.
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37
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