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What is the difference between append() and extend() in lists?

 
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 Amanda Kane
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In Python, the difference between append() and extend() is essential to understand, especially for beginners taking a python programming training course:

  • append() adds an object as a single element to the end of the list.

  • extend() adds each element of an iterable individually into the list.

Example:

 
a = [1, 2]
a.append([3, 4]) # ➝ [1, 2, [3, 4]]

a.extend([3, 4]) # ➝ [1, 2, 3, 4]

This is a common interview question and a core concept taught in every good python programming training course because it helps learners understand list behavior and data manipulation more effectively.


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Topic starter Posted : 13/11/2025 11:30 am
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