#!/bin/bash


function addition {
    local FIRST=$1
    local SECOND=$2

    let RESULT=FIRST+SECOND
    echo "Result is: $RESULT"
    let FIRST++
    let SECOND++
    return $RESULT
}

#do the addition of two numbers
echo -n "Enter first number: "
read FIRST
echo -n "Enter second number: "
read SECOND
addition $FIRST $SECOND

echo "RETURN: $?"
echo "Printing variable:"
echo "FIRST: $FIRST"
echo "SECOND: $SECOND"