Why getting error in bash for loop?

Question

I am trying to run the below code using for loop but i am getting syntax error. Please help.

Input Format: The first line of the input contains an i

Answer 1

This will work. However you should insert some helper messages inside:

#!/bin/bash

read n
sum=0

for (( i=1; i<=n; i++ ))
do
        read val
        ((sum^=val))
done
echo $sum