Shell Programming and Scripting

$ var1=123
$ var2-234
$ var3=345

$ i=1

for i in 1 2 3
do
con=${var$i)
echo $con
done

ksh: con=${var$i}: 0403-011 The specified substitution is not valid for this command.

con=var$i

#!/bin/ksh
var1=123
var2=234
var3=345
for i in 1 2 3
do      eval con=\${var$i}
        echo "$con  (using eval)"
done

echo
var=(ignored 123 234 345)
for i in 1 2 3
do      con=${var[$i]}
        echo "$con  (using ksh array w/subscript 1-3)"
done

echo
var=(123 234 345)
for i in 0 1 2
do      con=${var[$i]}
        echo "$con  (using ksh array w/subscript 0-2)"
done

echo
for con in 123 234 345
do      echo "$con  (using for loop directly)"
done

123  (using eval)
234  (using eval)
345  (using eval)

123  (using ksh array w/subscript 1-3)
234  (using ksh array w/subscript 1-3)
345  (using ksh array w/subscript 1-3)

123  (using ksh array w/subscript 0-2)
234  (using ksh array w/subscript 0-2)
345  (using ksh array w/subscript 0-2)

123  (using for loop directly)
234  (using for loop directly)
345  (using for loop directly)

eval con=\$var$i

con=$var1