The print command redirects the output of the print command to a file.
Syntax:
set print
set print "-"
set print "<filename>"
set print "<filename>" append
set print "|<shell_command>"
Without "<filename>", the output file is restored to <STDERR>. The <filename> "-" means <STDOUT>. The `append` flag causes the file to be opened in append mode. A <filename> starting with "|" is opened as a pipe to the <shell_command> on platforms that support piping.