The (LD) control code deletes a single line from the video display. All lines below the current cursor position are moved up one line overwriting the entire cursor line. A blank foreground line is inserted at the bottom of the screen. The cursor is inserted at the beginning (left side) of the just-inserted blank line.
a. 100 FORMAT (LD) . PRINT (0,100) b. PRINT (0) (LD)