Shell Programming and Scripting

for i in $(seq $first $last)
do
  does something here
done

$> read first
432
$>printf "%05d\n" $first
00432

for i in {00001..99999}
do
     does something here
done

for i in $(seq -w ${first} ${last})
do
     does something here
done

#!/usr/bin/env bash

# @(#) s1	Demonstrate c-like for-loop in bash.

pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C

pe
first=17
last=21
for (( i=first ; i<=last ; i++ ))
do
  printf "%05i\n" $i
done

exit 0

% ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0.8 (lenny) 
GNU bash 3.2.39

00017
00018
00019
00020
00021

for i in `seq -f%05g $first $last`