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.Dd $Mdocdate: October 4 2023 $
.Dt ORDINAL 1
.Os
.Sh NAME
.Nm ordinal
.Nd convert cardinal numbers to ordinal numbers
.Sh SYNOPSIS
.Nm
.Op Fl p Ar indicies ...
.Op Ar
.Sh DESCRIPTION
The
.Nm
utility converts cardinal numbers into ordinal numbers.
Input is read from the files provided as command-line arguments, or the standard
input if none are supplied.
Additionally, the special filename
.Sq -
can be provided to refer to the standard input.
.Pp
When processing input, any text that does not constitue a number
.Pq any sequence of the digits 0\(en9
is simply printed to the standard output verbatim.
Numbers on the other hand are suffixed as per the rules of the English language
(21 becomes
.Sq 21st ,
57 becomes
.Sq 57th ,
and so on).
The default behavior is to suffix all numbers with either
.Sq st ,
.Sq nd ,
.Sq rd ,
or
.Sq th
\(em although this behavior can be modified with the
.Fl p
flag.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl p Ns , Fl Fl positions Ns = Ns Ar indicies
Only convert the cardinal numbers in the positions specified by the
comma-separated list
.Ar indicies .
For example, if
.Ar indicies
is
.Sq 1,3,5 ,
then only the 1st, 3rd, and 5th numbers on each line of input will be converted.
.Pp
The provided list of indicies must only contain positive integers, and no
whitespace.
.El
.Sh EXIT STATUS
.Ex -std
.Sh EXAMPLES
Get the ordinal numbers 1\(en25:
.Pp
.Dl $ seq 25 | ordinal
.Pp
Get the date, turning the day of the month into an ordinal whiel the year
remains a cardinal
.Pq e.g. Sq 29th of September, 2003 :
.Pp
.Dl $ date +'%d of %B, %Y' | ordinal -p 1
.Sh SEE ALSO
.Xr date 1 ,
.Xr sed 1 ,
.Xr seq 1
.Sh AUTHORS
.An Thomas Voss Aq Mt mail@thomasvoss.com
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