None type

Question

Is none a string or is it a unique type?
In the lesson it is given to be an empty string
But when I tried to add it to another string it gave an error

Answer 1

It's not a string or any other common data type. None (or NULL) is a special datatype referring to the fact that a variable is not set, or unset.

Note that this is different from the number value 0 and also different from saving strings like "none" or "null", or even an empty string. it's also not the same as false, although comparing null/none to anything except null/none will always return false, so languages usually have other means of checking whether a value is set.

Answer 2

Perfect👍.... trying such things is what the lessons are for.
Also use the comment part there for questions like this.