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