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How to change awk and shell variable value?

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# 1  
Old 08-20-2010
How to change awk and shell variable value?
In awk script,
Code:
#!/bin/sh

awk 'BEGIN{i=0;}{i=i+5;}END{print i}' in.txt

vr=0;
vr=$i;
echo "$vr"

How can i assign that value of i in $vr(variable) of shell script?
# 2  
Old 08-20-2010
Try:
Code:
vr=`awk 'BEGIN{i=0;}{i=i+5;}END{print i}' in.txt`

# 3  
Old 08-20-2010
Quote:
Originally Posted by kevintse
Try:
Code:
vr=`awk 'BEGIN{i=0;}{i=i+5;}END{print i}' in.txt`

If this is the code:
Code:
#!/bin/sh

vr=0
awk '
BEGIN{a=0;i=0;}
{
    a=a+$5;
    arr[i]=$5;
    i++;
}
END{
    print a;
    for(j=0;j<i;j++){
        print arr[j];
    }
}' in_awk.txt)

I want to get the value of i to "$vr" variable.
How can i do that?
# 4  
Old 08-20-2010
I don't know if there's a standard way of doing this, I just come up with this and it works.

Code:
#!/bin/sh

vr=0
vr=`awk '
BEGIN{a=0;i=0;}
{
    a=a+$5;
    arr[i]=$5;
    i++;
}
END{
    print a;
    for(j=0;j<i;j++){
        print arr[j];
    }
     print i
}' in_awk.txt | tail -n 1`

echo $vr



---------- Post updated at 12:40 AM ---------- Previous update was at 12:35 AM ----------

Well there's another problem with this solution, all "print"s in AWK don't get printed to stdout...so it's not perfect.
# 5  
Old 08-20-2010
Quote:
Originally Posted by cola
If this is the code:
Code:
#!/bin/sh

vr=0
awk '
BEGIN{a=0;i=0;}
{
    a=a+$5;
    arr[i]=$5;
    i++;
}
END{
    print a;
    for(j=0;j<i;j++){
        print arr[j];
    }
}' in_awk.txt)

I want to get the value of i to "$vr" variable.
How can i do that?
Do you want to store all the lines in one variable or to process the lines one by one in your shell script?
# 6  
Old 08-20-2010
Quote:
Originally Posted by Franklin52
Do you want to store all the lines in one variable or to process the lines one by one in your shell script?
Hello,
I just want to get the value of i after processing every line.
Something like this:
vr=$i
There are seven lines in in.txt file.
So the value of i and vr would be 7.
# 7  
Old 08-20-2010
Quote:
Originally Posted by cola
Hello,
I just want to get the value of i after processing every line.
Something like this:
vr=$i
There are seven lines in in.txt file.
So the value of i and vr would be 7.
Post your input file and the desired output.
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