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Problems with sum operation

 
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# 1  
Old 05-15-2006
Problems with sum operation
i wrote this code..

#!/bin/sh
sum=0
for i in `cat numbers.txt |cut -f1`
do
sum=expr $sum + $i
done
echo $sum


I want to read the numbers in the file numbers.txt. and find sum of them. But this code only writes the numbers(without making sum) that it reads. Help me..
# 2  
Old 05-15-2006
Try a bit of awk
burakkilic,

I normally use awk for this kind of problem - it works effectively

awk '{tot+=$1} END{print tot}' numbers.txt

Alternatively, change your script as shown:

#!/bin/sh
sum=0
for i in `cat numbers.txt |cut -f1`
do
sum=`expr $sum + $i` # Add back quotes around the expr
done
echo $sum


Steve
# 3  
Old 05-15-2006
Thank you very much!.. The code is working properlySmilie
 
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