Printf command

Shell Programming and Scripting
1

Hi,

I a sequance number from 1-999 and i want asing the value like 001,002..999

Exp:
file_001
file_002
file_003...

file_999

How can i disaplay the sequnace number as mention above.

2 
 
echo ""| awk '{ for(i=1;i<=999;i++) printf "file_%.3d\n",i }'
3

panyam solution works. here I want to mention zsh. :slight_smile:
if you have zsh, with

setopt BRACE_CCL

your requirement can be as easy as:

kent$ echo file_{001..100}

output would be:

file_001 file_002 file_003 file_004 file_005 file_006 file_007 
... 
file_040 file_041 file_042 file_043....
file_099 file_100
4

If you have the seq command:

seq 1 10|xargs -I '{}' printf "file_%03d%s\n" {}

Most modern shells also do brace expansion, but it's not a part of POSIX:

echo {1..10}|xargs -n1|xargs -I '{}' printf "file_%03d%s\n" {}