mkdir

Hi,
I look for a script to create 150 directories :
d000
d001
d002
...
...
d149
would you help me please ?
I think it would be
for i
mkdir d$i

Many thanks.
PS :
#uname -a
AIX fserver 3 5 0050691A4C00

#!/bin/ksh
let number=0
while [[   $number -lt 150 ]] 
do
    mkdir d"$number"
done

Thank you.