Explain nested if base program

Question

nested if

Answer 1

Please specify the language and elaborate on your question. We will not be able to answer it in the current form.

Answer 2

Link to the answer of the questions :- https://www.codesdope.com/java-decide-if-or-else/
(It's a beginner question so I'm posting external link. Don't mind :) )

Answer 3

java language