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In Python, nested lists are lists that contain other lists as elements. Using a for loop with nested lists allows you to iterate through each element in the outer list and then iterate through the elements of each inner list. This tutorial will guide you through the basics of using for loops with nested lists in Python, providing code examples along the way.
A nested list is essentially a list within another list. Here's an example:
In this case, nested_list contains three inner lists, each with three elements.
To iterate through the elements of a nested list, you can use nested for loops. The outer loop iterates through the outer list, and the inner loop iterates through each inner list. Let's take a look at an example:
In this example, the outer loop iterates through each inner list ([1, 2, 3], [4, 5, 6], [7, 8, 9]), and the inner loop iterates through each element in the inner list, printing the elements on the same line. The end=' ' argument in the print function is used to separate the elements by a space.
You can also access individual elements in a nested list using indices. Here's an example:
In this example, the outer loop iterates through the indices of the outer list, and the inner loop iterates through the indices of the inner list, printing the element at the specified index.
Using for loops with nested lists in Python allows you to efficiently process and manipulate multi-dimensional data structures. By understanding the basic structure of nested lists and how to iterate through them, you can perform various operations on your data. Practice with different nested lists and loop structures to solidify your understanding.
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