Do you recall our exploration of the if-else and elif constructs in Python? It was a fascinating journey through multiple conditions and decision-making, wasn't it? Our journey isn't stopping there! In this unit, we're amplifying our knowledge by delving into Nested Conditions. This concept enables us to embed even greater flexibility and power into our programming.

Nested conditions occur when an if, elif, or else construct is placed within another if, elif, or else construct. This nesting establishes a hierarchy of conditions, granting us the capability to capture more complexity.

Let's revisit the travel agency example. Suppose that now, in addition to age, we also want to consider the customer's budget. People over 18 years of age with a budget above $1000 receive an international travel package, while those with smaller budgets receive a local travel package. Here's how we can use nested conditions to model this: