How do you sum numbers in a Unix shell script?

Answer 1

try a for loop:

for x in 1 2 3 4

n=0

do

n=`echo $x+$n`|bc

done

Integer arithmetic can be done in the shell itself without requiring an external program, making the operation much faster:

n1=123

n2=543

sum=$(( $n1 + $n2 ))

echo "$sum"