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Shell Programming and Scripting

if condition doesn't work

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# 1  
Old 06-12-2009
if condition doesn't work
i want to get the value for column 4rth when i =4. please guide what i am doing wrong. thanks

var=`cat file.csv`
for i in $var; do {
if [ "$i" -eq 4 ]; then
var4=$var4+$i

fi
echo $i
}
done
I am geting this error message "0403-009 The specified number is not valid for this command."
# 2  
Old 06-12-2009
Not clear what you are trying to do. Please post some sample input from file.csv and the matching sample output from the script.
# 3  
Old 06-12-2009
here is csv file
xerox @DDCM READY 2
xerox xerox READY 3
i need to get column 1,3,4 values. but column 4 is differnt so need to get sum.
i would like to get value of column 4 from first line and then sum up with second line (2+3=5)
# 4  
Old 06-12-2009
Hammer & Screwdriver Is this what you are trying to do?
Code:
> cat file23
xerox @DDCM READY 2 
xerox xerox READY 3 

> awk '{sum=sum+$4} END {print sum}' file23
5

# 5  
Old 06-12-2009
One way would be to use the awk command.
Code:
var=`awk -F" " 'BEGIN{total=0;}{total+=$4;}END{print total}' testfile`

Then
Code:
echo $var
5

# 6  
Old 06-12-2009
Quote:
Originally Posted by BubbaJoe
One way would be to use the awk command.
Code:
var=`awk -F" " 'BEGIN{total=0;}{total+=$4;}END{print total}' testfile`

Then
Code:
echo $var
5

You don't need to initialize 'total'. All variable are strings by default and initialized to an empty string (""). Once you start performing arithmetic, an empty string is casted to 0.
# 7  
Old 06-15-2009
Thanks guys both reply works fine.once again thanks a lot for your help.
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