Commodore PET - BASIC Format Functions; Pos; Spc

arg
VAL converts the string argument by first discarding any leading blanks. If
the first non-blank character
is not a numeric digit (0-9), the argument is returned
as a value of O. If the first non-blank is a digit. VAL begins converting the string
into real number format.
If it subsequently encounters a non-digit character. it
stops processing so that the argument returned is the numerical equivalent of the
string up to the first non-digit character.
Examples:
A=VAL("123")
NN=VAL(B$)
BASIC FORMAT FUNCTIONS
POS
POS is a limited use function that returns the column position of the cursor.
Format:
POS(arg)
where:
is a dummy argument and may be string or
numeric.
For
POS purposes, the character positions along each row are numbered 0
through 39. Character positions for a string
are numbered 0 through 255. POS
returns the current cursor position (0-255) except after a Home, Clear Screen, or
POKE, which do not reset the POS indicator. The position is taken as the current
cursor position before the
POS function itself is typed. POS is reset to 0 at each
RETURN.
Examples:
?POS(1)
?"0iliJ ABC";POS(1)
SPC
At the beginning of a line,
returns
O.
With a previous POS value of 0,
prints a POS value of 6.
SPC moves the cursor right a specified number of positions.
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