Question

• Bash script:

Create a bash script that takes numbers as parameters, calculates sum and prints the result. If no parameters passed, prompt a user (only one time) to enter numbers to sum and print the result.

Submit your program as LastName_FirstName.sh file.

Answer 1

RAW CODE (ALONG WITH COMMENTS)

#! /bin/bash

sum=0

if [[ $# -eq 0 ]] ### In case  no argument is provided
        then
                echo "Enter Numbers to sum" ### Asking for numbers to sum
                read -a arr  ### Reading numbers in array
                for arg in ${arr[@]}
                do
                        ((sum += arg)) ### summing all the numbers
                done
                echo "Sum = $sum" ### Printing sum
else ### In case arguments are provided
        for arg in "$@" ; do
                ((sum += arg)) ### summing them
        done
        echo "Sum = $sum" ### Printing sum
fi

SCREENSHOTS (CODE AND OUTPUT)

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