printf "%'d\n" 1234567

formatting number with comma

it is not work with Cygwin's bash3.X. Test in Linux. use printf "%'f" number while it is floating point number
Sample Output

By: twfcc
2009-08-15 14:48:56

These Might Interest You

  • scale define the number you want after comma Show Sample Output

    echo "scale=6;2048 / 2.345" | bc
    eastwind · 2010-04-05 12:06:50 0
  • Useful when you need to write e.g. an INSERT for a table with a large number of columns. This command will retrieve the column names and comma-separate them ready for INSERT INTO(...), removing the last comma.

    mysql -u <user> --password=<password> -e "SHOW COLUMNS FROM <table>" <database> | awk '{print $1}' | tr "\n" "," | sed 's/,$//g'
    maxmanders · 2009-10-29 13:42:17 0
  • This is an "argument calculator" funktion. The precision is set to 4 and you can use dot (.) or comma (,) as decimal mark (which is great for german users with a comma on the numpad).

    calc() { echo "scale=4; ${*//,/.}" | bc -l; }
    fpunktk · 2011-10-24 19:58:20 0
  • Insert a comma where necessary when counting large numbers. I needed to separate huge amounts of packets and after 12+ hours of looking in a terminal, I wanted it in readable form. Show Sample Output

    perl -pe '$_=reverse;s/\d{3}(?=\d)(?!.*?\.)/$&,/g;$_=reverse'
    sil · 2009-02-18 16:34:18 0
  • "sort_csn" is a function to sort a comma separated list of numbers. Define the the function with this: sort_csn () { echo "${1}" | sed -e "s/,/\n/g"| sort -nu | awk '{printf("%s,",$0)} END {printf("\n")}' | sed -e "s/,$//"; } Use the function like this: sort_csn 443,22,80,8200,1533,21,1723,1352,25 21,22,25,80,443,1352,1533,1723,8200 One example where this is useful is when port scanning with nmap and getting a list of open ports in random order. If you use Nessus, you may need to create a scan policy for that set of specific ports and it is clearer to read with the port numbers in ascending order (left to right). Caveat: no spaces in the comma separated list (just number1,number2,number3,etc). A variation of this to sort a comma separated list of strings: sort_css () { echo "${1}" | sed -e "s/,/\n/g"| sort -u | awk '{printf("%s,",$0)} END {printf("\n")}' | sed -e "s/,$//"; } usage: sort_css apples,pears,grapes,melons,oranges apples,grapes,melons,oranges,pears Show Sample Output

    sort_csn () { echo "${1}" | sed -e "s/,/\n/g"| sort -nu | awk '{printf("%s,",$0)} END {printf("\n")}' | sed -e "s/,$//"; }
    mpb · 2011-01-26 15:18:08 2
  • Convert comma separated files to tab separated files. (MySQL eats tab separated files with much less instruction than comma seperated files.) Show Sample Output

    sed 's/,/\t/g' report.csv > report.tsv
    viner · 2009-07-23 15:39:03 2

What Others Think

It doesn't work on cygwin because of the difference in libc version. Linux uses glibc. Cygwin should too but it doesn't... Compare "man 3 libc" on cygwin vs. linux.
romulusnr · 449 weeks and 3 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?

You must be signed in to comment.

What's this? is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.


Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: