Any sequence of one or more symbols is called “data”.
When we interpret this data, we can turn it into information.
And, to make sure this information is accessible, we categorise our data into different types.
Below are the most common ones (don’t memorise them, I'll link to this page if needed):
Integers — any whole number (e.g. -6, 4, 98)
Float — any number with decimal points (e.g. -2.45, 8.3)
String — any sequence of characters (e.g. "2mmol/L")
Booleans — either True or False
Finally, we can get to what you came for: the fundamentals of machine learning/AI.