Difference between chomp and trim in Perl?

Question

What is the difference between chomp and trim in Perl? Which one is better to use and when?

Answer 1

Chomp: The chomp() function will remove (usually) any newline character from the end of a string. The reason we say usually is that it actually removes any character that matches the current value of $/ (the input record separator), and $/ defaults to a newline.
For more information see chomp.

As rightfold has commented There is no trim function in Perl. Generally people write a function with name trim (you can use any other name also) to remove leading and trailing white spaces (or single or double quotes or any other special character)

trim remove white space from both ends of a string:

$str =~ s/^\s+|\s+$//g;

Answer 2

trim removes both leading and trailing whitespaces, chomp removes only trailing input record separator (usually new line character).

Answer 3

Chomp: It only removes the last character, if it is a newline.

More details can be found at: http://perldoc.perl.org/functions/chomp.html

Trim: There is no function called Trim in Perl. Although, we can create our function to remove the leading and trailing spaces in Perl. Code can be as follows:

perl trim function - remove leading and trailing whitespace

sub trim($)
{
  my $string = shift;
  $string =~ s/^\s+//;
  $string =~ s/\s+$//;
  return $string;
}

More details can be found at :http://perlmaven.com/trim