参数

item

item may be an integer value of the element or the constant name of the element. The following is a list of constant names for item that may be used and their description. Some of these constants may not be defined or hold no value for certain locales.

nl_langinfo Constants

Constant	Description
LC_TIME Category Constants
ABDAY_(1-7)	Abbreviated name of n-th day of the week.
DAY_(1-7)	Name of the n-th day of the week (DAY_1 = Sunday).
ABMON_(1-12)	Abbreviated name of the n-th month of the year.
MON_(1-12)	Name of the n-th month of the year.
AM_STR	String for Ante meridian.
PM_STR	String for Post meridian.
D_T_FMT	String that can be used as the format string for strftime() to represent time and date.
D_FMT	String that can be used as the format string for strftime() to represent date.
T_FMT	String that can be used as the format string for strftime() to represent time.
T_FMT_AMPM	String that can be used as the format string for strftime() to represent time in 12-hour format with ante/post meridian.
ERA	Alternate era.
ERA_YEAR	Year in alternate era format.
ERA_D_T_FMT	Date and time in alternate era format (string can be used in strftime()).
ERA_D_FMT	Date in alternate era format (string can be used in strftime()).
ERA_T_FMT	Time in alternate era format (string can be used in strftime()).
LC_MONETARY Category Constants
INT_CURR_SYMBOL	International currency symbol.
CURRENCY_SYMBOL	Local currency symbol.
CRNCYSTR	Same value as CURRENCY_SYMBOL.
MON_DECIMAL_POINT	Decimal point character.
MON_THOUSANDS_SEP	Thousands separator (groups of three digits).
MON_GROUPING	Like "grouping" element.
POSITIVE_SIGN	Sign for positive values.
NEGATIVE_SIGN	Sign for negative values.
INT_FRAC_DIGITS	International fractional digits.
FRAC_DIGITS	Local fractional digits.
P_CS_PRECEDES	Returns 1 if CURRENCY_SYMBOL precedes a positive value.
P_SEP_BY_SPACE	Returns 1 if a space separates CURRENCY_SYMBOL from a positive value.
N_CS_PRECEDES	Returns 1 if CURRENCY_SYMBOL precedes a negative value.
N_SEP_BY_SPACE	Returns 1 if a space separates CURRENCY_SYMBOL from a negative value.
P_SIGN_POSN	Returns 0 if parentheses surround the quantity and CURRENCY_SYMBOL. Returns 1 if the sign string precedes the quantity and CURRENCY_SYMBOL. Returns 2 if the sign string follows the quantity and CURRENCY_SYMBOL. Returns 3 if the sign string immediately precedes the CURRENCY_SYMBOL. Returns 4 if the sign string immediately follows the CURRENCY_SYMBOL.
N_SIGN_POSN
LC_NUMERIC Category Constants
DECIMAL_POINT	Decimal point character.
RADIXCHAR	Same value as DECIMAL_POINT.
THOUSANDS_SEP	Separator character for thousands (groups of three digits).
THOUSEP	Same value as THOUSANDS_SEP.
GROUPING
LC_MESSAGES Category Constants
YESEXPR	Regex string for matching "yes" input.
NOEXPR	Regex string for matching "no" input.
YESSTR	Output string for "yes".
NOSTR	Output string for "no".
LC_CTYPE Category Constants
CODESET	Return a string with the name of the character encoding.