Perl Programming/Keywords/print

The print keyword

print prints a string or a list of strings and returns true, if successful. The parametre FILEHANDLE may be a scalar variable with a reference to the file handle. This introduces a level indirection for the print.

If FILEHANDLE is a variable followed term, it may be misinterpretedby the system as an operator unless a + is added inbetween, or all arguments are put in parentheses. Without the FILEHANDLE, the last selected output handle is used. Without LIST, the function prints $_ to the current output handle.

To use FILEHANDLE and use the $_, a real filehandle like FH and not an indirect filehandle like $fh is required.

Syntax

  print FILEHANDLE LIST
  print FILEHANDLE
  print LIST
  print

Examples

The code

	$filename = "assign.pl";
	print $filename . "\n";

	open(my $fh, "<", $filename) 
		or die "cannot open < " . $filename . ": $!";

	read $fh, $f, 1024;

	print $f;

	close($fh);

returns the contents of the file "assign.pl":

 assign.pl
 $tmp = "909135790159";
 
 print $tmp . "\n";
 $tmp =~ y/13579/24680/;
 […]
 print $tmp . "\n";

See also

• printf
• select
• sprintf