freebsd-skq/usr.bin/seq/seq.1

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.\" This code is derived from software contributed to The NetBSD Foundation
.\" by Brian Ginsbach.
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.\" $FreeBSD$
.\"
.Dd February 19, 2010
.Dt SEQ 1
.Os
.Sh NAME
.Nm seq
.Nd print sequences of numbers
.Sh SYNOPSIS
.Nm
.Op Fl w
.Op Fl f Ar format
.Op Fl s Ar string
.Op Fl t Ar string
.Op Ar first Op Ar incr
.Ar last
.Sh DESCRIPTION
The
.Nm
utility prints a sequence of numbers, one per line
.Pq default ,
from
.Ar first
.Pq default 1 ,
to near
.Ar last
as possible, in increments of
.Ar incr
.Pq default 1 .
When
.Ar first
is larger than
.Ar last
the default
.Ar incr
is -1.
.Pp
All numbers are interpreted as floating point.
.Pp
Normally integer values are printed as decimal integers.
.Pp
The
.Nm
utility accepts the following options:
.Bl -tag -width Ar
.It Fl f Ar format
Use a
.Xr printf 3
style
.Ar format
to print each number.
Only the
.Cm E ,
.Cm e ,
.Cm f ,
.Cm G ,
.Cm g ,
and
.Cm %
conversion characters are valid, along with any optional
flags and an optional numeric minimum field width or precision.
The
.Ar format
can contain character escape sequences in backslash notation as
defined in
.St -ansiC .
The default is
.Cm %g .
.It Fl s Ar string
Use
.Ar string
to separate numbers.
The
.Ar string
can contain character escape sequences in backslash notation as
defined in
.St -ansiC .
The default is
.Cm \en .
.It Fl t Ar string
Use
.Ar string
to terminate sequence of numbers.
The
.Ar string
can contain character escape sequences in backslash notation as
defined in
.St -ansiC .
This option is useful when the default separator
does not contain a
.Cm \en .
.It Fl w
Equalize the widths of all numbers by padding with zeros as necessary.
This option has no effect with the
.Fl f
option.
If any sequence numbers will be printed in exponential notation,
the default conversion is changed to
.Cm %e .
.El
.Pp
The
.Nm
utility exits 0 on success and non-zero if an error occurs.
.Sh EXAMPLES
.Bd -literal -offset indent
# seq 1 3
1
2
3

# seq 3 1
3
2
1

# seq -w 0 .05 .1
0.00
0.05
0.10
.Ed
.Sh SEE ALSO
.Xr jot 1 ,
.Xr printf 1 ,
.Xr printf 3
.Sh HISTORY
The
.Nm
command first appeared in
.Tn "Plan 9 from Bell Labs" .
A
.Nm
command appeared in
.Nx 3.0 ,
and ported to
.Fx 9.0 .
This command was based on the command of the same name in
.Tn "Plan 9 from Bell Labs"
and the
.Tn GNU
core utilities.
The
.Tn GNU
.Nm
command first appeared in the 1.13 shell utilities release.
.Sh BUGS
The
.Fl w
option does not handle the transition from pure floating point
to exponent representation very well.
The
.Nm
command is not bug for bug compatible with the
.Tn "Plan 9 from Bell Labs"
or
.Tn GNU
versions of
.Nm .