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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:


Sample Shell Script

# set array called nameservers
set -A nameservers
# print all name servers
for i in ${nameservers[@]
	echo $i
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{ 4 comments… add one }

  • Nisrine August 19, 2011, 7:05 am

    If i need to print the next value in the array if a certain condition is verified
    for example:
    for i in “${array[@]}”
    if(….) then
    echo $(i+1)

    $(i+1) is wrong what can i do?

    • Jason October 16, 2012, 12:26 pm

      Hi Nisrine,

      I hope my necromancing is welcome here, in case your issue is still relevant.

      $(ì+1) should actually be $((i+1)), since double parentheses evaluate mathematical expressions.

      I hope this helps someone!


      • Nisrine October 16, 2012, 2:14 pm

        Thank you for ur reply! working!

  • Ken June 18, 2012, 9:21 pm

    Excellent just what i needed for looping through an array

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