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  • Note that the above ksh93 script only works in locales where the decimal separator is . (so not in half the world where the decimal separator is ,). zsh doesn't have that issue. Commented Jul 23, 2014 at 6:20
  • Indeed, answer edited to clarify that point. Commented Jul 23, 2014 at 12:13
  • Setting LC_NUMERIC won't work if the user has set LC_ALL, that also means that numbers will not be displayed (or input) in the user's preferred format. See unix.stackexchange.com/questions/87745/what-does-lc-all-c-do/… for a potentially better approach. Commented Jul 23, 2014 at 12:20
  • @StéphaneChazelas fixed the LC_NUMERIC issue. Given the OP script syntax, I'm assuming his preferred separator is . anyway. Commented Jul 23, 2014 at 15:20
  • Yes, but it's the locale of the script user, not the locale of the script author that matters. As a script author, you should take localisation and its side effects into account. Commented Jul 23, 2014 at 15:29