Android Studio – How to add string that starts with '@' into the String.xml file?

I want to set suffix for the email and want to use string.xml

<string name="emailSuffix">@gmail.com</string>

code is not allowing me to add ‘@’ at start of the string.

Any idea how and what should I do?

I have searched but found nothing but I have tried finding code for ‘@’ like ‘ , " etc but no result there also.