What is the correct way to break a line of Perl code into two?

Question

$ cat temp.pl use strict; use warnings;  print "1\n"; print "hello, world\n";  print "2\n"; print "hello, world\n";  print "3\n"; print "hello, \ world\n";  $ perl temp.pl 1 hello, world 2 hello, world 3 hello,  world $ 

To make my code easily readable, I want to restrict the number of columns to 80 characters. How can I break a line of code into two without any side effects?

As shown above, a simple ↵ or \ does not work.

What is the correct way to do this?

Answer 1

In Perl, a carriage return will serve in any place where a regular space does. Backslashes are not used like in some languages; just add a CR.

You can break strings up over multiple lines with concatenation or list operations:

print "this is ",     "one line when printed, ",     "because print takes multiple ",     "arguments and prints them all!\n"; print "however, you can also " .     "concatenate strings together " .     "and print them all as one string.\n";  print <<DOC; But if you have a lot of text to print, you can use a "here document" and create a literal string that runs until the delimiter that was declared with <<. DOC print "..and now we're back to regular code.\n"; 

You can read about here documents in in perldoc perlop.