(coreutils.info.gz) seq invocation

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(coreutils.info.gz) Numeric operations

 
 26.2 'seq': Print numeric sequences
 ===================================
 
 'seq' prints a sequence of numbers to standard output.  Synopses:
 
      seq [OPTION]... LAST
      seq [OPTION]... FIRST LAST
      seq [OPTION]... FIRST INCREMENT LAST
 
    'seq' prints the numbers from FIRST to LAST by INCREMENT.  By
 default, each number is printed on a separate line.  When INCREMENT is
 not specified, it defaults to '1', even when FIRST is larger than LAST.
 FIRST also defaults to '1'.  So 'seq 1' prints '1', but 'seq 0' and 'seq
 10 5' produce no output.  The sequence of numbers ends when the sum of
 the current number and INCREMENT would become greater than LAST, so 'seq
 1 10 10' only produces '1'.  Floating-point numbers may be specified.
  Floating point.
 
    The program accepts the following options.  Also see  Common
 options.  Options must precede operands.
 
 '-f FORMAT'
 '--format=FORMAT'
      Print all numbers using FORMAT.  FORMAT must contain exactly one of
      the 'printf'-style floating point conversion specifications '%a',
      '%e', '%f', '%g', '%A', '%E', '%F', '%G'.  The '%' may be followed
      by zero or more flags taken from the set '-+#0 '', then an optional
      width containing one or more digits, then an optional precision
      consisting of a '.' followed by zero or more digits.  FORMAT may
      also contain any number of '%%' conversion specifications.  All
      conversion specifications have the same meaning as with 'printf'.
 
      The default format is derived from FIRST, STEP, and LAST.  If these
      all use a fixed point decimal representation, the default format is
      '%.Pf', where P is the minimum precision that can represent the
      output numbers exactly.  Otherwise, the default format is '%g'.
 
 '-s STRING'
 '--separator=STRING'
      Separate numbers with STRING; default is a newline.  The output
      always terminates with a newline.
 
 '-w'
 '--equal-width'
      Print all numbers with the same width, by padding with leading
      zeros.  FIRST, STEP, and LAST should all use a fixed point decimal
      representation.  (To have other kinds of padding, use '--format').
 
    You can get finer-grained control over output with '-f':
 
      $ seq -f '(%9.2E)' -9e5 1.1e6 1.3e6
      (-9.00E+05)
      ( 2.00E+05)
      ( 1.30E+06)
 
    If you want hexadecimal integer output, you can use 'printf' to
 perform the conversion:
 
      $ printf '%x\n' $(seq 1048575 1024 1050623)
      fffff
      1003ff
      1007ff
 
    For very long lists of numbers, use xargs to avoid system limitations
 on the length of an argument list:
 
      $ seq 1000000 | xargs printf '%x\n' | tail -n 3
      f423e
      f423f
      f4240
 
    To generate octal output, use the printf '%o' format instead of '%x'.
 
    On most systems, seq can produce whole-number output for values up to
 at least 2^{53}.  Larger integers are approximated.  The details differ
 depending on your floating-point implementation.   Floating
 point.  A common case is that 'seq' works with integers through
 2^{64}, and larger integers may not be numerically correct:
 
      $ seq 50000000000000000000 2 50000000000000000004
      50000000000000000000
      50000000000000000000
      50000000000000000004
 
    However, note that when limited to non-negative whole numbers, an
 increment of 1 and no format-specifying option, seq can print
 arbitrarily large numbers.
 
    Be careful when using 'seq' with outlandish values: otherwise you may
 see surprising results, as 'seq' uses floating point internally.  For
 example, on the x86 platform, where the internal representation uses a
 64-bit fraction, the command:
 
      seq 1 0.0000000000000000001 1.0000000000000000009
 
    outputs 1.0000000000000000007 twice and skips 1.0000000000000000008.
 
    An exit status of zero indicates success, and a nonzero value
 indicates failure.
 

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(coreutils.info.gz) factor invocation

(coreutils.info.gz) Numeric operations