Returns the length in characters of the value of EXPR. If EXPR is omitted, returns the length of $_ . If EXPR is undefined, returns undef.
This function 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.
Like all Perl character operations, length normally
deals in logical
characters, not physical bytes. For how many bytes a string encoded as
UTF-8 would take up, use length(Encode::encode('UTF-8', EXPR))
(you'll have to use Encode
first). See Encode and perlunicode.