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Character code - Handling of character code in Perl

I am writing about the handling of character codes in Perl. For the handling of Perl character codes, please read the following articles first. 90%of Perl's character code handling can be understood by reading this article.

• Encode.pm - Handle multibyte strings such as Japanese properly

Character code related

• Expressing Unicode characters with code points
• Easy way to find the code point of a character's Unicode
• A modern way to convert half-width katakana to full-width katakana
• Representing square meters (m2) in Unicode