Question

what is the meaning of nested list​

Answer 1

Answer:

A nested list is simply a list that occurs as an element of another list (which may of course itself be an element of another list, etc.). Common reasons nested lists arise are: They're matrices (a list of rows, where each row is itself a list, or a list of columns where each column is itself a list).

Answer 2

Answer:

A nested list is a list that appears as an element in another list. In this list, the element with index 3 is a nested list. ... To extract an element from the nested list, we can proceed in two steps. First, extract the nested list, then extract the item of interest.