Commodore VIC-20 - Page 134

120 The VIC 20 User Guide
When numeric variables are assigned to numeric strings using the
STR$ function, the sign value preceding the number (blank
if positive,-if
negative) is transferred along with the number. This is shown in the follow-
ing short program:
",1'£1 ,AB-t2343 .
20 PI- -1*3.14159265
3£1 n-STR$(AB)
4£1 , N.t~:r~'(PIL,
;~ePR;l~!,"AB~!~l!JB
/'60 PRf~i,iT,-'1 fT •.
78 PRINT "NI-";N$
RUN + Space left for sign value
AB....
12343
T$... 12343
N:$=-3.1415:5'26!5
However, if a number is entered enclosed in quotation marks, or if the
number
is entered as a string with an INPUT or READ statement, then the
numeric string is treated like any other alphabetic
or graphic string. No
blank for a positive sign value
is inserted before the number. This is demon-
strated in the following program:
Ie AB"12345
28 Tf-"12345"
38 READ R$
4£1 DATA 12345
5£1 PRINT "AB=";AB
68 PRINT"Tf=";Tf
78 PRINT "R$="jR$
RUN
AB- 12345 ~.---- Space inserted
T$-12345 No space inserted
R$-12345 No space inserted
Concatenate the two numeric strings T$ and Q$ to make a new numeric
string
W$ so that the string W$ contains the ten digits 1,2,3,4,5,6,7,8,9,0.
Here
is one possibility:
18 r-12345.
20 1iI=67890
30 l~'i5§'TRS( n