Bash script that will accept 5 input values and find the sum of them.

sumofinputvalues.sh

#!/bin/bash
declare -i counter sum
declare -a -i var
declare -a order
order=([0]="first" [1]="second" [2]="third" [3]="fourth" [4]="fifth")
counter=0
sum=0
while(($counter < 5))
do
 echo "Enter the ${order[$counter]} number to add:"
 read var[$counter]
 sum+=var[$counter]
 ((counter+=1))
done
echo "The sum of the elements you entered is : $sum"