Linux Admin 3: awk -- saving your work

put your awk commands in a file: -f
here's an example: simple.awk
note BEGIN and FS operators
minor syntax differences
code in BEGIN { } is executed once
code after BEGIN's close bracket gets run on each line
more code:

BEGIN {
	{ print "A simple addition program\n"; }
}
{ printf "%i + %i = %i\n",$1, $2, c=$1+$2 }