How to get string length in Perl?

Question

What is the Perl equivalent of strlen() ?

Answer 1

  perldoc -f length

    length EXPR
    length Returns the length in characters of the value of EXPR.  If EXPR is
            omitted, returns length of $ _.  Note that this cannot be used on an
            entire array or hash to find out how many elements these have.  For
            that, use "scalar @array" and "scalar keys% hash" respectively.

            Note the characters: if the EXPR is in Unicode, you will get the num-
            ber of characters, not the number of bytes.  To get the length in
            bytes, use "do {use bytes; length (EXPR)}", see bytes.

Answer 2

Although 'length ()' is the correct answer that should be used in any normal code, the horror of abigel length should be mentioned, if only for the sake of Perl lore.

Basically, the trick is to use the return value of the catch-all transliteration operator:

 print "foo" =~ y===c; # prints 3 

y /// c replaces all characters themselves (thanks to the complement option 'c') and returns the number of characters replaced (so, in fact, the length of the string).

Answer 3

 length($string) 

Answer 4

length() function:

 $string ='String Name'; $size=length($string); 

Answer 5

You should not use this since length ($ string) is simpler and more readable, but in case someone comes across this, they also get the length of the string:

 my $length = map $_, $str =~ /(.)/gs; my $length = () = $str =~ /(.)/gs; my $length = split '', $str;