Question

Exercise 13.5 Write a Bash script that contains two numeric arrays, array1 and array2, initialized to the values in the sets {1, 2, 3, 4, 5} and {1, 4, 9, 16, 25}, respectively. The script should produce and display an array whose elements are the sum of the corresponding elements in the two arrays. Thus, the first element of the resultant array is 1 + 1 = 2, the second is 2 + 4 = 6, and so on.

Answer 1

#!/bin/bash

# Arr1 create an array
arr1=(1 2 3 4 5)
# Arr2 create an array
arr2=(2 4 6 8 10)
# create an empty result array
res=()
# ${!arr1[@]} will provide a array of indices. We will walk through them.
for i in ${!arr1[@]}
do
# Add the elements in arr1 and arr2 at index i.
sum=$(( ${arr1[$i]} + ${arr2[$i]} ))
# Add element to the result array
res+=( $sum )
done

# Display the arrays and the result array
echo ${arr1[@]}
echo ${arr2[@]}
echo ${res[@]}