Iterating through a range of ints in ksh?

How can I iterate through a simple range of ints using a for loop in ksh?

For example, my script currently does this...

for i in 1 2 3 4 5 6 7
do
   #stuff
done

...but I'd like to extend the range way above 7. Is there a better syntax?

Curly brackets?

for i in {1..7}
do
   #stuff
done

While loop?

while [[ $i -lt 1000 ]] ; do
    # stuff
   (( i += 1 ))
done

on OpenBSD, use jot:

for i in `jot 10`; do echo $i ; done;

ksh93, Bash and zsh all understand C-like for loop syntax:

for ((i=1; i<=9; i++))
do
    echo $i
done

Unfortunately, while ksh and zsh understand the curly brace range syntax with constants and variables, Bash only handles constants (including Bash 4).

Using seq:

for i in $(seq 1 10)
do 
  echo $i
done

The following will work on AIX / Linux / Solaris ksh.

#!/bin/ksh

d=100

while (( $d < 200 ))
do
   echo "hdisk$d"
  (( d=$d+1 ))
done

Optionally if you wanted to pad to 5 places, i.e. 00100 .. 00199 you could begin with:

#!/bin/ksh
typeset -Z5 d

-Scott

Just a few examples I use in AIX because there is no range operator or seq, abusing perl instead.

Here's a for loop, using perl like seq:

for X in `perl -e 'print join(" ", 1..10)'` ; do something $X ; done

This is similar, but I prefer while read loops over for. No backticks or issues with spaces.

perl -le 'print "$_ " for 1..10;' | while read X ; do xargs -tn1 ls $X ; done

My fav, do bash-like shell globbing, in this case permutations with perl.

perl -le 'print for glob "e{n,nt,t}{0,1,2,3,4,5}"' | xargs -n1 rmdev -dl