Texas Instruments TI-99/4A - Page 123

STR$ - String-Number
STR$(numeric·expression)
The string-number function converts the number specified by the
argument into a string. The argument is the value obtained when
the numeric'expression is evaluated. The normal rules for the
evaluatlOn of numenc expressions are used here. When
the number is converted into a string, the string is a valid
representation of a numeric constant with no leading or trailing
spaces.
For example, If B =bY.5, then STR$ (B) is the string "69.5."
Only string operations may be performed on the strings created
using the string-number function. The string-number function is the
inverse of
the value function (VAL); see below. In the example.
note that leading and trailing spaces are not present on the numbers
converted to strings
VAL - Value
VAL(string'expression)
The value function is the inverse of the string-number function
(STR$); see above. If the string specified by the stnnd,-
expression is a valid representation of a numeric constant, then the
value function converts the string to a numeric constant. For
example. if A$ ="1234". then VAL(A$) =1234. The normal rules
for the evaluation of
string expressions are used here. If the
stnng specified is not a valid representation of a number or if
the
string is of zero length, the message "BAD ARGUMENT"
is displayed and the program stops running. If you specify a string
whIch is longer than 254 characters, the message "BAD
ARGUMENT" is displayed and the program stops running.
User's Reference Guide
Examples:
>NEW
>100 A=-26.3
>110 PAINT STA~(II);" ";11
>120 PRINT 15.7;STR$(15.7)
>130 PRINT STR$(VAL("34.8"»
>140 END
>RUN
-26.3 -26.3
15.7 15.7
34.8
** DONE **
>NEW
>100 p:$="23.o··
>110 N$="-4.7"
>120 PRINT VAL(P$);VAL(N$)
>130
PRINT VAL("52"&".5")
>140 PRINT VAL(N$&"E"&"12")
>150 PRINT STR$(VAL(P$»)
>160
END
>RUN
23.6 -4.7
52.5
-4.7E+12
23.6
** DONE **
II·103