using bc in bash script

Question

I am trying outputing result in floating point using bc in bash.But I am getting the following output for the following code.How can i get the multiplication result from here and also why i am getting command not found.

 #!/bin/bash 
 v1=3.41 
 v2=45 
 v3= $(bc <<< "scale=4;$v1 + $v2")
 echo $v3 
 v3= $(bc <<< "scale=4;$v1 - $v2") 
 echo $v3 
 v3= $(bc <<< "scale=4;$v1 / $v2") 
 echo $v3 
 v3= $(bc <<< "scale=4;$v1 % $v2") 
 echo $v3
 v3 = $(bc <<< "scale=4;$v1 * $v2") 
 echo $v3

the output i am getting is below :

mint@mint ~ $ bash bc.sh 
bc.sh: line 4: 48.41: command not found

bc.sh: line 6: -41.59: command not found

bc.sh: line 8: .0757: command not found

bc.sh: line 10: .0035: command not found

bc.sh: line 12: v3: command not found

Please take a look: http://www.shellcheck.net/ – Cyrus Dec 24 '15 at 18:27 — Cyrus, Dec 24 '15 at 18:27

score 6 · Answer 1 · answered Dec 24 '15 at 18:20

6

Whitespace does matter. Remove it.

v3= $(bc <<< "scale=4;$v1 + $v2")
   ^

Explanation: The following command runs app with a locally exported var with a value value:

var=value app

In your case value is empty.

answered Dec 24 '15 at 18:20

Karoly Horvath

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Ah....thanks a lot for your help.Multiplication also works now only by removing that extra space. :) – user3708629 Dec 24 '15 at 18:24

using bc in bash script

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