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C++ API

: strftime (fmt, tm_struct)

Format the time structure tm_struct in a flexible way using the format string fmt that contains ‘%’ substitutions similar to those in printf.

Except where noted, substituted fields have a fixed size; numeric fields are padded if necessary. Padding is with zeros by default; for fields that display a single number, padding can be changed or inhibited by following the ‘%’ with one of the modifiers described below. Unknown field specifiers are copied as normal characters. All other characters are copied to the output without change. For example: 

strftime ("%r (%Z) %A %e %B %Y", localtime (time ()))
     ⇒ "01:15:06 AM (CST) Monday 17 February 1997"

Octave’s strftime function supports a superset of the ANSI C field specifiers.

Literal character fields:

%%

% character.

%n

Newline character.

%t

Tab character.

Numeric modifiers (a nonstandard extension):

- (dash)

Do not pad the field.

_ (underscore)

Pad the field with spaces.

Time fields:

%H

Hour (00-23).

%I

Hour (01-12).

%k

Hour (0-23).

%l

Hour (1-12).

%M

Minute (00-59).

%p

Locale’s AM or PM.

%r

Time, 12-hour (hh:mm:ss [AP]M).

%R

Time, 24-hour (hh:mm).

%s

Time in seconds since 00:00:00, Jan 1, 1970 (a nonstandard extension).

%S

Second (00-61).

%T

Time, 24-hour (hh:mm:ss).

%X

Locale’s time representation (%H:%M:%S).

%z

Offset from UTC (±hhmm), or nothing if no time zone is determinable.

%Z

Time zone (EDT), or nothing if no time zone is determinable.

Date fields:

%a

Locale’s abbreviated weekday name (Sun-Sat).

%A

Locale’s full weekday name, variable length (Sunday-Saturday).

%b

Locale’s abbreviated month name (Jan-Dec).

%B

Locale’s full month name, variable length (January-December).

%c

Locale’s date and time (Sat Nov 04 12:02:33 EST 1989).

%C

Century (00-99).

%d

Day of month (01-31).

%e

Day of month ( 1-31).

%D

Date (mm/dd/yy).

%h

Same as %b.

%j

Day of year (001-366).

%m

Month (01-12).

%U

Week number of year with Sunday as first day of week (00-53).

%w

Day of week (0-6).

%W

Week number of year with Monday as first day of week (00-53).

%x

Locale’s date representation (mm/dd/yy).

%y

Last two digits of year (00-99).

%Y

Year (1970-).

See also: strptime, localtime, gmtime, mktime, time, now, date, clock, datenum, datestr, datevec, calendar, weekday.

Package: octave