Python and Algorithmic Thinking for the Complete Beginner

Chapter 19 Nested Decision Control Structures

19.1 What are Nested Decision Control Structures?

Nested decision control structures are decision control structures that are “nested” (enclosed) within another decision control structure. This means that one decision control structure can nest (enclose) another decision control structure (which then becomes the “nested” decision control structure). In turn, that nested decision control structure can enclose another decision structure, and so on.

An example of a nested decision control structure is shown here.

This can be rearranged to become

and the Python code is shown here.

if x < 30:

if x < ...