Name
seq — stdin stdout - file -- opt --help --version
Synopsis
seq [options
]specification
The seq
command prints a
sequence of integers or real numbers, suitable for piping to other
programs. There are three kinds of specification
arguments:
- A single number: an upper limit
seq
begins at 1 and counts up to the number.$ seq 3 1 2 3
- Two numbers: lower and upper limit
seq
begins at the first number and counts as far as it can without passing the second number.$ seq 2 5 2 3 4 5
- Three numbers: lower limit, increment, and upper limit
seq
begins at the first number, increments by the second number, and stops at (or before) the third number.$ seq 1 .3 2 1 1.3 1.6 1.9
You can also go backward with a negative increment:
$ seq 5 -1 2 5 4 3 2
Useful options
| Print leading zeroes, as necessary, to give all lines the same width: $ seq -w 8 10 08 09 10 |
| Format the output
lines with a $ seq -f '**%g**' 3 **1** **2** **3** |
| Use the given string as a separator between the numbers. By default, a newline is printed (i.e., one number per line): $ seq -s ':' 10 1:2:3:4:5:6:7:8:9:10 |
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