How to use Array and Arithmetic for in KSH?

[micotao]

Hi,all:
Please look at the following ksh script.

#!/bin/ksh
set -A name 1 2 3 4 5
NUM_MAX=5
for ((i = 0; i <= NUM_MAX-1; i++))
do
    echo ${A[$i]}
done

I can't see obvious errors, but in fact, I got the following syntax error reporting:
./test[4]: syntax error at line 4 : `((' unexpected

Can you please help to look into this issue?
How to use arithmetic for? Is there anything wrong with my usage?

Thanks a lot.

 

[PHV]

Something like this ?
set -A name 1 2 3 4 5
NUM_MAX=${#name[*]}; typeset -i i=0
while [[ $i < $NUM_MAX ]]
do
echo ${name[$i]}
(( i+=1 ))
done

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244

 

[RodKnowlton]

micotao,

The arithmetic form of for is only available in ksh93 compliant versions of ksh. ESC CTL-V at the command prompt should give you the version date. If it's equal to or earlier than 11/16/88, the form you used won't work.

Another test would be to attempt the assignment:

foo.bar="test"

If you get an error message, it's not ksh93.

Rod Knowlton
IBM Certified Advanced Technical Expert pSeries and AIX 5L
CompTIA Linux+
CompTIA Security+

 

[bharix]

PHV
QUOTE "while [[ $i < $NUM_MAX ]]"

should it be not ?
while (( $i < $NUM_MAX ))

can be tricky sometimes..