Web Reference: Mar 19, 2016 · How do nested for loops (in this case double for loops) work in creating a 2D list. For example I would like to have a 2x2 matrix that is initialized with 0 as every element. Dec 20, 2025 · A 2D list in Python is essentially a list of lists, commonly used to store data in a table-like format with rows and columns. This article focuses on correct and incorrect ways to create 1D and 2D lists in Python. To find or print a value from a 2D list requires the use of nested iteration. Finding a value requires one for loop to iterate through all of the lists in a 2D list, and a second loop to iterate through all values within a list:
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