Add variable preceding numbers

[Dominal]

Hello!

I have a file which stores a number between 1~9999999. However, if the number is less than 7 digits, I need to fill it with 0s. e.g. if the number is 14, then I need to make it be 0000014. Any hints?

Thanks!

 

[Ygor]

printf "%07d\n" `cat file1`

 

[Dominal]

Ygor, sorry for misleading. What I mean is, the value in file1 is unknown, or better say it changes everyday. If file1 contains 14, we need to add 5 preceding 0s to 0000014. If file1 contains 8682, we need to add 3 0s to 0008682.

My approach is to add seven 0s to the number in file1 which yields [0000000<1~7 digit number>], and cut the right hand side 7 digits to [<(7-no. of digits in file1) 0s><number in file1>].

I tried your method printf &quot;%07d\n&quot; `cat file1` but it doesn't work. Thanks a lot!

 

[danielhozac]

What doesn't work with
[tt]printf &quot;%07d\n&quot; `cat file1`[/tt]
? //Daniel

 

[Dominal]

Ygor & DanielHozac,

It works! Thanks for your help!