#!/bin/bash

nr_args=$#

if [ "$nr_args" -eq 0 ]; then
    echo "Error: No arguments provided. Usage: $0 <arg1> <arg2> ..."
    exit 1
fi

sum=0

for (( i=1; i<=$nr_args; i++ ))
do
	eval arg=\${$i}
	 sum=$((sum + arg))
done

echo "Sum is: $sum"