KSH For Loop Array: Iterate Through Array Values

How do I use ksh for loop to iterate thought array values under UNIX / Linux / BSD operating systems?

You can define array as follows:

set -A arrayName value1 value2 value3

For example, create an array called characters with three values as follows:

set -A characters Mugen Jin Fuu

To print first value, enter:

echo ${characters[0]}

To print 3rd and last value, enter:

echo ${characters[2]}

To print all values, enter:

echo ${characters[@]}

To count number of items in an array called characters, enter:

echo ${#characters[@]}

You can use for loop as follows to iterate through all values:

for i in ${characters[@]}; do echo "Samurai Champloo character - $i"; done

Sample outputs:

Samurai Champloo character - Mugen
Samurai Champloo character - Jin
Samurai Champloo character - Fuu

You can add two more items as follows to exiting array:

characters[3]="Sunflower-Samurai"
characters[4]="Detective-Manzo"

Sample Shell Script

#!/bin/ksh
# set array called nameservers
set -A nameservers 192.168.1.1 192.168.1.5 202.54.1.5
 
# print all name servers
for i in ${nameservers[@]
do
 echo $i
done