Returns the length incharacters of the value of EXPR. If EXPR is omitted, returns the length of$_. If EXPR is undefined, returnsundef.
This function cannot be used on an entire array or hash to find out how many elements these have. For that, usescalar @array andscalar 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, uselength(Encode::encode('UTF-8', EXPR)) (you'll have touse Encode first). SeeEncode andperlunicode.
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