Radio Shack TRS-80 model III Owner's Manual page 112

DISK BASIC
210 LINE INPUT "TYPE
IN
YOUR NAME "5 A$
220 LINE INPUT "DO
YOU LIKE YOUR COMPUTER?
"5 B$
230 LINE INPUT "WHY?
"
5
C$
235 PRINT
240 PRINT
A$
:
PRINT
250
IF
B$= "NO"
THEN 270
2S0 PRINT
"I
LIKE MY
COMPUTER BECAUSE "5
C$
:END
270 PRINT
"I
DO
NOT LIKE
MY
COMPUTER BECAUSE "5
C$
Notice
that
when
line
210
is
executed, a
question
mark
is
not displayed
after
the
statement,
"Type
in
your name."
Also, notice
on
line
230 you can
answer
the
question
"Why"
with a statement
full
of
delimiters,
commas
and
quotes.
MID$ =
Replace Portion
of String
wd$
(oldstring,
position, length)
=
replacement-string
o/tf5fr/7?ff
is
the
variabie-name
of
the string
you want
to
change.
pessiei
character
to
be changed.
length
is
a
numeric expression specifying the
number
of
characters
to
be
replaced.
replacement-string
is
a string
expression
to
replace the specified portion
of oldstring.
Note:
if
replacement-string
is
shorter
than
length,
then the
entire
replacement-
string
This statement
lets
you
replace
any
part
of
a string
with a specified
new
string,
giving
you
a
powerful
string editing capability.
Note
that the
length of the resultant string
is
always
the
same
as the original
string.
Examples
a$
=
"Lincoln"
in the
examples below:
MID$(A$,
3*
4)
=
"12345": PRINT
A$
which
returns
LH234N.
111