Sum of integer variables bash script

Question

How can I do the sum of integers with bash script I read some variables with a for and I need to do the sum.

I have written the code like this:

Read N 
Sum=0
for ((i=1;i<=N;i++))
do
   read number 
   sum=sum+number
done
echo $sum

Answer 1

Use the arithmetic command ((...)):

#! /bin/bash
read n
sum=0
for ((i=1; i<=n; i++)) ; do
   read number 
   ((sum+=number))
done
echo $sum