How to assign output of float expression to a variable in a shell script?

Question

Here is my code

read a
read b
c=`echo $a / $b | bc`
echo "Answer is: " $c

I inputted values 10 and 3 to a and b respectively and i got the answer 3 in integer. So i put scale as below

read a
read b
c=`scale=2;echo $a / $b | bc`
echo "Answer is: " $c

But it gives an error "command not found"

So how is it possible? See i want to store the answer in the variable, as i know to display float calculations using echo only. I want the answer 3.33 stored in the variable $c.

anubhava · Accepted Answer · 2017-08-23 10:57:58Z

3

You need to use quotes around scale=2 and your math expression:

a=10; b=3
c=$(echo "scale=2; $a / $b" | bc)    
echo "$c"

3.33

edited Aug 23, 2017 at 10:57

answered Aug 23, 2017 at 10:54

anubhava

790k67 gold badges603 silver badges671 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How to assign output of float expression to a variable in a shell script?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related