Create a list of binary numbers

echo {0..1}{0..1}{0..1}{0..1}

If you should happen to find yourself needing some binary numbers, this is a quickie way of doing it. If you need more digits, just add more "{0..1}" sequences for each digit you need. You can assign them to an array, too, and access them by their decimal equivalent for a quickie binary to decimal conversion (for larger values it's probably better to use another method). Note: this works in bash, ksh and zsh. For zsh, though, you'll need to issue a setopt KSH_ARRAYS to make the array zero-based. binary=({0..1}{0..1}{0..1}{0..1}) echo ${binary[9]}

Sample Output

0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111

By: dennisw

2009-06-23 17:30:20

echo bash binary ksh zsh decimal array

1 Alternatives + Submit Alt

Convert decimal numbers to binary

Convert some decimal numbers to binary numbers. You could also build a general base-converter: function convBase { echo "ibase=$1; obase=$2; $3" | bc; } then you could write function decToBun { convBase 10 2 $1; } Show Sample Output
This is sample output - yours may be different.
```
$ for i in {0..10}; do decToBin $i; done
0
1
10
11
100
101
110
111
1000
1001
1010
```
4

function decToBin { echo "ibase=10; obase=2; $1" | bc; }

woxidu · 2009-11-24 22:57:58 4

What Others Think

Although I can't think of a situation where this command would have helped me, it still gets a thumbs up for being cool :-) . Nice one.

Alanceil · 797 weeks and 4 days ago

Really surprised to see this command. I don't know of its use, but it rocks!

Bluehive · 797 weeks and 2 days ago

Wonderful -- I didn't know I could do things like {1..10}. That'll simplify some of my scripts.

tremby · 797 weeks and 2 days ago

@tremby: Yes, "for i in {1..10}; do", for example, comes in really handy. You can also do letters: "{m..p}" gives "m n o p".

dennisw · 797 weeks and 2 days ago

kewl!

kamathln · 786 weeks and 3 days ago

I thought heaven can't help me now commendation

yeoyeo · 163 weeks and 6 days ago

rahimhh21 · 108 weeks and 5 days ago

Perfecthomepugs · 100 weeks and 4 days ago

pugpuppies95 · 62 weeks and 4 days ago

donperi1 · 55 weeks and 5 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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