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#lc EXPR

#lc

Returns a lowercased version of EXPR. This is the internal function implementing the\L escape in double-quoted strings.

If EXPR is omitted, uses$_.

What gets returned depends on several factors:

#Ifuse bytes is in effect:

#On EBCDIC platforms

The results are what the C language system calltolower() returns.

#On ASCII platforms

The results follow ASCII semantics. Only charactersA-Z change, toa-z respectively.

#Otherwise, If EXPR has the UTF8 flag set

If the current package has a subroutine namedToLower, it will be used to change the case (See"User-Defined Case Mappings" in perlunicode.) Otherwise Unicode semantics are used for the case change.

#Otherwise, ifuse locale is in effect

Respects current LC_CTYPE locale. Seeperllocale.

#Otherwise, ifuse feature 'unicode_strings' is in effect:

Unicode semantics are used for the case change. Any subroutine namedToLower will not be used.

#Otherwise:

#On EBCDIC platforms

The results are what the C language system calltolower() returns.

#On ASCII platforms

ASCII semantics are used for the case change. The lowercase of any character outside the ASCII range is the character itself.

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