Commodore Plus 4 - Page 171

10 X = VAL("RIUO17*M) X = 0
10 X = VAL("-1.23.23.23") X=-1.23
Strinp Stnn9 functions differ from numeric functions in that they return
Functions cnaracters> graphics or numbers from a string (defined by quotation
marks) instead of a number.
CHR$(X)
This function returns a string character whose ASCII code is X.
ERR$(N)
Returns string describing error condition N (see TRAP)
HEX$(N)
Returns a 4 character string containing the hexadecimal representa
tion of value N (0 < N < 65535)
LEFTS(XS.X)
This returns a string containing the leftmost X characters of XS.
LEN(X$}
Returns the number of characters (including spaces and other
symbols) in the string X$.
MID$(X$,S,X)
This returns a string containing X characters, starting from the Sth
character in XS. MID$ can also be used on the left side of assignment
statement as a pseudo-variable as well as a function. MID$ (string
variable, starting position, length) = source string.
This function reassigns values of positions (starting position) through
(starting position + length) of source string to the characters of string
variable in corresponding locations. Length defaults to the length of
string variables, and an error results if (starting position + length) is
greater than the length of the source string.
EXAMPLE:
10 A$="THE DOG IN THE HAT":
— 20 PRINT A$
30MID$(A$,5,3)-"CAT"
40 PRINT A$
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