Challenge: Creating User Profile & Activity Details

You're developing a user profile and activity tracker for a website. Complete the program by following the steps below:

1. Declare a constant called DEFAULT_COUNTRY with the value "United States".
2. Declare a variable username and assign it "John Doe".
3. Declare a variable age and set it to 30.
4. Declare a variable country and set it equal to DEFAULT_COUNTRY.
5. Declare a variable isSubscribed and set it to true.
6. Declare a variable loginCount and set it to 5.
7. Declare a variable loginReward and set it to 250.
8. Then perform the following updates:
   • Increment the value of loginCount using the ++ operator.
   • Increase loginReward by 50 using the += operator.
9. Finally: create a variable welcomeMessage that joins the following values using the + operator:
   • username
   • " is "
   • age
   • " years old and has logged in "
   • loginCount
   • " times. The Login Reward balance is "
   • loginReward
10. Output the welcomeMessage.