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Format a number with zeros in Unix shell

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tbeghain -  
Hello,

I would like to format a number in Unix shell so that it always has two numeric positions. For example, 1 becomes 01, 2 becomes 02, etc...

Of course, I can do this with a bit of programming, but is it possible to do it with a simple command?

Thank you 
Configuration: AIX 5.2

8 answers

  1.  jipicy Moderator
    Hello,
    [tmpfs]$ for i in $(seq 10); do printf "%02d\n" "$i"; done 01 02 03 04 05 06 07 08 09 10
    ;-))

    --
    Z'@+...che.
    JP : Zen, my Nuggets ! ;-) Knowledge is only good when it is shared.
    2
    1. lami20j Moderator
      That's no longer synchronization
      It's at a higher level, telepathy for example ;-))
      --
      lami20j
      0
    2. jipicy Moderator
      @lami20jIt's clear ;-))

      But there must have been some interference, I didn't quite catch the "20" ;-DDDDD

      --
      Z'@+...che.
      JP : Zen, my Nuggets ! ;-) Knowledge is only valuable if it's shared.
      0
  2. lami20j Moderator
    Hello,

    there is the printf command 
    root@debian:~# for i in $(seq 20);do printf "%02d\n" $i;done 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20

    --
    lami20j
    1
    2. tbeghain Author
      Thank you very much, the printf does exactly what I wanted.
      0
      2. tbeghain Author
        Sorry, but I have a weird little thing with printf specifically with the numbers 8 and 9 exclusively

        When running the following script:
        AA=` printf "%02d\n" "07" `
        echo $AA
        AA=` printf "%02d\n" "08" `
        echo $AA
        AA=` printf "%02d\n" "09" `
        echo $AA
        AA=` printf "%02d\n" "10" `
        echo $AA
        AA=` printf "%02d\n" "7" `
        echo $AA
        AA=` printf "%02d\n" "8" `
        echo $AA
        AA=` printf "%02d\n" "9" `
        echo $AA

        I get the following results

        07
        printf: 08 not completely converted
        00
        printf: 09 not completely converted
        00
        10
        07
        08
        09

        Why do 08 and 09 not work???? while all other numbers pass???? Is it due to my Unix? Who has cursed the 8 and 9?
        0
        1. jipicy Moderator
          I assure you that under GNU/Linux I have exactly the same problem and I don't know why!?

          I have tried all forms of "quotation" in all kinds (i>single, double, with, without, etc.) and nothing works!!!

          Even without using a variable, in pure command line, it crashes ;-((

          Any solutions, leads or hints of explanation will be welcome.

          Thank you.

          --
          Z'@+...che.
          JP : Zen, my Nuggets ! ;-) Knowledge is only good when it is shared.
          0
          1. lami20j Moderator
            Hello,

            try this
            lami20j@debian:~$ cat ccm.sh #!/bin/bash AA=` printf "%02.f\n" "07" ` echo $AA AA=` printf "%02.f\n" "08" ` echo $AA AA=` printf "%02.f\n" "09" ` echo $AA AA=` printf "%02.f\n" "10" ` echo $AA AA=` printf "%02.f\n" "7" ` echo $AA AA=` printf "%02.f\n" "8" ` echo $AA AA=` printf "%02.f\n" "9" ` echo $AA lami20j@debian:~$ sh ccm.sh 07 08 09 10 07 08 09


            --
            lami20j
            0
            1. jipicy Moderator
              You math nerd ;-))

              Thank you.

              --
              Z'@+...che.
              JP : Zen, my Nuggets ! ;-) Knowledge is only good if it is shared.
              0
          2. lami20j Moderator
            When you write 01, 02 ... 08, 09 the numbers are interpreted as octal
            in octal 8 = 10 and 9 = 11

            An octal number cannot contain digits beyond 7 inclusive 
             lami20j@debian:~$ printf "%o and %o and %o\n" 0777 777 521 777 and 1411 and 1011 lami20j@debian:~$

            however when you write 8 and 9 these are decimal numbers so I can convert them to octal 
            lami20j@debian:~$ printf "%o and %o\n" 8 9 10 and 11

            --
            lami20j
            0
            1. jipicy Moderator
              Thank you very much lami20j ;-))

              --
              Z'@+...che.
              JP : Zen, my Nuggets ! ;-) Knowledge is only good if it is shared.
              0
            2. lami20j Moderator
              @jipicyYou're welcome :-))
              --
              lami20j
              0
            3. eko
              @lami20jI would need help; I have the same problem, except that I would like to do it with numbers in base 16.
              Thank you in advance.
              0