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Functions
7-12
SPC
The
SPC
function returns a string
of
spaces n characters long when used with a
PRINT
statement, as in the example below.
SPC,
unlike the
SP
ACE$ function, does
not
return
an
actual string, only a series
of
spaces.
It
may
only be used with a
PRINT
statement.
SPC (integer)
10
PRINT
20
PRINT SPC
(10);
"Question
1 ":PRINT:PRINT
30
PRINT SPC (15);"How many states are there in binary
logic?":PRINT
40
INPUT A$:PRINT:PRINT
50
IF
A$
=
"2"
THEN PRINT
"Correct"
ELSE GOTO
750
saR
The
SQR function returns
the
square
root
of
the specified expression.
The
expres-
sion must evaluate
to
be greater
than
or
equal
to
zero,
or
an
error
message
is
returned.
SQR
is
calculated in single precision.
SQR(expression)
The
program
below finds the square
root
of
input A, which
is
entered by the user,
then displays it:
10
INPUT A
20
PRINT SQR(A)
30
END
RUN
?
45
6.70821
RUN
?
-1
ILLEGAL FUNCTION CALL
IN
20
STRINGS
The
STRING$ function returns a string
of
the same character repeated the specified
number
of
times.
If
an
integer argument
is
used, the ASCII character having
that
numeric code
is
returned the specified
number
of
times.
If
a string argument
is
sup-
plied, the first character
of
the string
is
returned the specified number
of
times.
STRING$ (expression, expressionlstring expression)
10
A$
= STRING$(10,97)
20
PRINT
A$
RUN
aaaaaaaaaa
OK
10
A$=STRING$(10,"A")
20
PRINT
A$
RUN
AAAAAAAAAA
Ok
BASIC·SO