View original (French)

Set a variable to 3 digits

Solved
Patrick33 -  
dubcek Posted messages 18627 Registration date   Status Contributor Last intervention   -
Hello forum user,
I’m here to ask whether it’s possible to force a variable that contains a number to be a certain number of spaces.
For example, if I set varA=001 and then increment this variable, its value will be 2 whereas I’d like it to be 002.
Thanks in advance for your answers!

2 answers

  1. Anonymous user
     
    hello, 

    printf '%03d\n' 1 12 113 1114
    2
    1. Patrick33
       
      What are all the numbers after the printf for?
      0
    2. Anonymous user
       
      it's the format! XD
      d : indicates an integer
      3 : indicates the desired right shift
      0 : indicates to pad with zeros on the left

      see man 3 printf
      0
    3. Patrick33
       
      No, I understood that. I'm talking about those after the command "1 12 113 1114"
      0
    4. Patrick33
       
      The command works but not when I enter it into a variable.
      varB=printf '%03d\n' $varA
      It's probably a silly mistake because I'm just starting with the shell
      0
    5. Patrick33
       
      I was missing the $(), it's fixed, thanks for your help!
      0
  2. blux Posted messages 2045 Registration date   Status Moderator Last intervention   3 455
     
    Hi,

    what's it for?
    Because if the goal is just display, then you handle it digitally internally and when you want to display, you format...

    --
    A+ blux 
     "Les cons, ça ose tout.
    C'est même à ça qu'on les reconnait"
    0
    1. Patrick33
       
      I have a series of about a hundred files named in the form nomdufichier_000.txt. The number at the end of the name increments. I want to perform an operation on these files one after another in increasing order, so I’d like to use a variable to do, for example, "grep -n 'toto' *$mavariable.txt"; however, this variable, when I increment it, gets simplified. That is, it will do 001 + 1 = 2 and not 002, so on the next pass it will search for the file *2.txt which no longer points to a single unique file.
      0