Next year I might tell students that O is not a good variable name to use in hand-written exam answers.
@franklinchen Doesn't help if it's actually a letter O though! Best just use something legible and clear...
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
@franklinchen Doesn't help if it's actually a letter O though! Best just use something legible and clear...