Shell Programming and Scripting

PRDCNT=12
FILS=
f1=1
f2=2
f3=3
f4=4
f5=5
CNT=0
CNT=`expr $PRDCNT - 5`
MNT=6
VR=1
while [ $MNT -le $PRDCNT ]
do
f$VR="$f$VR,$MNT"
echo "$f$VR"
MNT=`expr $MNT + 1`
CNT=`expr $CNT - 1`
VR=`expr $VR + 1`
if [ $VR -gt 5 ]
then
VR=1
fi
done

getting the following error
swa.sh: f1=1,6: not found
1
swa.sh: f2=2,7: not found
2
swa.sh: f3=3,8: not found
3
swa.sh: f4=4,9: not found
4
swa.sh: f5=5,10: not found
5
1 2 3 4 5
swa.sh: f1=1,11: not found
1
swa.sh: f2=2,12: not found
2
swa.sh: f3=3,13: not found
3
swa.sh: f4=4,14: not found
4
swa.sh: f5=5,15: not found
5
1 2 3 4 5

could some one please help

first part . . . . you're trying to assign values to variables named f1, f2, f3.

In order to do that, you must use "eval" before each of those statements:

ie:

Code:

eval f$VR="$f$VR,$MNT"

next, for efficiency's sake, use this instead of expr:

Code:

var=$(( var + 1 ))

... or similar math type statements.

Thanks for the reply.
this is the output I am getting
sh swa.sh
1,6 2,7 3,8 4,9 5,10
1,11 2,12 3,13 4,14 5,15

But I expect the output to be 1,6,11 2,7,12 3,8,13 4,9,14 5,10,15

Please post the revised code. When I made my recommended changes to your script, i got much different results.

PRDCNT=15
FILS=
f1="1"
f2="2"
f3="3"
f4="4"
f5="5"
CNT=0
CNT=`expr $PRDCNT - 5`
echo $CNT
MNT="6"
VR=1
while [ $MNT -le $PRDCNT ]
#while [ $CNT -gt 0 ]
do
# f$VR="$f$VR $MNT"
eval f$VR="$f$VR,$MNT"
# echo "$f$VR"
MNT=`expr $MNT + 1`
CNT=`expr $CNT - 1`
VR=`expr $VR + 1`
if [ $VR -gt 5 ]
then
echo $f1 $f2 $f3 $f4 $f5
VR=1
fi
done

and as replacement for expr are they parenthesis() or curly brackets {}

they are parenthesis.

You're having "eval" parsing problems. Try this:

Code:

PRDCNT=15
FILS=
f1="1"
f2="2"
f3="3"
f4="4"
f5="5"
CNT=0
CNT=`expr $PRDCNT - 5`
echo $CNT
MNT="6"
VR=1
while [ $MNT -le $PRDCNT ]
do
        eval f$VR="\$f$VR,$MNT"
        MNT=`expr $MNT + 1`
        CNT=`expr $CNT - 1`
        VR=`expr $VR + 1`
        if [ $VR -gt 5 ]
         then
                echo $f1 $f2 $f3 $f4 $f5
                VR=1
        fi
done