Add Commas to Number Output 1

[jtanner]

Hello,

First off, thanks to everyone here for being so helpful in me getting up-to-speed in the strange new UNIX world!

In a Bourne shell script I have a variable that contains a number (ex: 1049312). This number is in bytes and I'd like to make it more readable for my output. Ex. 1,049,312

How can I change a string that contains a number so as it has commas to make it easier to read?

Thanks,

JT

 

[stefanwagner]

command | rev | sed 's/\([0-9]\{3\}\)/\1 /g' | rev

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[feherke]

Hi

Or abit spectacular way : ;-)

command | sed 's/\([^,]\)\([^,]\{3\}\)$/\1,\2/;:r;s/\([^,]\)\([^,]\{3\},\)/\1,\2/;tr'

Tested with GNU [tt]sed[/tt].

Feherke.

http://rootshell.be/~feherke/

 

[aigles]

# add commas to numeric strings, changing "1234567" to "1,234,567"
 sed ':a;s/\B[0-9]\{3\}\>/,&/;ta'                      # GNU sed
 sed -e :a -e 's/\(.*[0-9]\)\([0-9]\{3\}\)/\1,\2/;ta'  # other seds

Jean-Pierre.

 

[stefanwagner]

@ aigles et. al.

can you (someone) explain the Gnu-sed-command - especially the \B and \> are new to me (and I did not found them in man sed).

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[aigles]

\B
Matches everywhere but on a word boundary; that is it matches if
the character to the left and the character to the right are
either both "word" characters or both "non-word" characters.

\>
Constrains a RE to match the end of a string or to
precede a character that is not a digit, underscore,
or letter.


All these escapes here are GNU extensions

Jean-Pierre.