I am writing a linux bash script that reads off the file, \"file.txt\" which has

Question

I am writing a linux bash script that reads off the file, "file.txt" which has a series of tokens with letters and numbers. I am having a couple problems with it

my first problem - here I am searching the file for a token with "BPN" followed by three numbers. In this problem there are two occurences of this. One is "BPN070" and the other is "BPN130". I need to display just the number portion and multiply the number by 100.

if

bpn=$(egrep -o 'BPN[0-9][0-9][0-9]' file.txt | cut -c5-6); then

bpn=$(($bpn*100))

printf "Occurence(s): %d" $bpn

fi

my problem is that I get this error :

./file2.st: line 61: 70

30*100: syntax error in expression (error token is "30*100")

My second problem is that I am searching a token beginning with "Z" followed by 4 digits, there is one occurence of this, "Z2002"

I then need to display only the number and turn it into a decimal, "20.02"

z1=$(egrep -o 'Z[0-9][0-9][0-9][0-9]' file.txt | cut -c2-5)

z1=$(($z1/100))

printf "The number is: %d feet " $z1

but it displays as "20"

Explanation / Answer

For the first problem try $(( $bpn * 100 )) or  pipe it to "bc" like $(( $bpn*100 | bc))

Edited one:

printf '%.2f' $( echo $z1/100 | bc -l ) It prints up to 2 decimals

If u dont want it replace it with %f instead of %.2f

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