How to store the output of calculation to variable using bash script

Question

I want to do a simple coding by storing the product of calculation using command bc into variable.

answer="$varnameX % $num1" | bc
echo "the result is $answer"

it did not show the product of calculation once i run the command

the answer is

See also: How can I assign the output of a command to a shell variable? — G-Man Says 'Reinstate Monica', Mar 22 '19 at 05:24

score 2 · Answer 1 · answered Mar 22 '19 at 05:20

2

If you want to use bc, then:

answer=$(echo "$varnameX % $num1" | bc)
echo "the result is $answer"

Or:

answer=$(expr $varnameX % $num1 )

answered Mar 22 '19 at 05:20

Prvt_Yadav

score 0 · Answer 2 · answered Mar 22 '19 at 04:31

0

answer=`expr $varnameX % $num1`

answered Mar 22 '19 at 04:31

kevlinux

2 Answers2