| Blank One line
0 Two lines
1 To first line of next page
A blank line is treated as if its first character is a blank. A blank that appears as a carriage control character is deleted. A zero is changed to a newline. A one is changed to a form feed. The effects of a "+" are simulated using backspaces.
a.out | fpr | lpr
fpr < f77.output | lpr
The fpr command appeared in BSD 4.2 .
Results are undefined for input lines longer than 170 characters.