What characterizes a nested conditional?

A nested conditional is characterized by the presence of an if/else block inside another if/else block. This structure allows for more complex decision-making in programming. When the outer conditional is evaluated, it can lead to additional branching where the inner conditional can further refine the decisions based on specific criteria that are checked only if the outer condition is met. For example:

if condition1:

if condition2:

action if both condition1 and condition2 are true

else:

action if condition1 is true but condition2 is false

else:

action if condition1 is false

In this example, the first `if` is the outer conditional, and the second `if` is the nested conditional. This allows programmers to create more intricate logic flows that can handle multiple scenarios in a coherent manner. The ability to nest conditionals increases the functionality and expressiveness of the code.