#!/bin/bash

# Write a while loop that prompts for and then adds the two provied 
#   values.  
#   Then prompt the user if he/she wants to continue y or n.
#   * Does not error checking.
#
ans=y

while [ "$ans" = y ]
do
  echo -n "First number ? "; read num1
  echo -n "Second number ? "; read num2
  
  echo "total = `expr $num1 + $num2`"

  echo -n "Continue y/n? "; read ans
done