shell script 1

[sco21]

I have a file with some numbers on it.
2
3
4
5
6
7
8
8

How can I add all this numbers and make a sum of them

whith expr ?
how?




thanks

 

[marsd]

sum=0
for xx in `cat filename`
do
sum=`expr $xx + $sum`
done
echo $sum