RETURNS 1 IF THE DISK D EXISTS, 0 OTHERWISE
ACTION
The fonction DISK_EXISTS(D) returns 1 if the disk D exists and 0 otherwise.
D is one letter from A to Z.
SYNTAX:
Result=DISK_EXISTS(D)
USE ERROR EXAMPLE
rem test if the disk C exists
if disk_exists("C")=1 then print "the disk exists"
DISK_EXISTS()
DISK_EXISTS(D)
SEE ALSO
DISK_KILO_FREE()
DISK_KILO_SIZE()