Type III C lass A Program

UP Request
Format:
UP < n >
U 1
n is an integer indicating the number of lines by which
the pointer should be moved back. The default is 1.
Usage:
The UP request repositions the pointer n lines before the
current line. If n is 0 or unspecified, a value of 1 is
assumed, and the pointer is moved up to the previous line in
the file. If n is greater than the number of lines between
the top of the file and the current line, the request
functions as a TOP request,.
Responses:
Verify mode:
Brief mode:
Example:
The line at which the pointer is repositioned
is printed, and the keyboard is unlocked.
The keyboard is unlocked.
U 9
This request repositions the pointer nine lines before the
current line.
100 EDIT - UP