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Predict the output: What will be the result of this nested list comprehension?

result = [[x * y for x in range(1, 3)] for y in range(1, 3)]

  1. [[1, 2], [2, 4]]

  2. [[1, 2, 2, 4]]

  3. [1, 2, 2, 4]

  4. [[1, 1], [2, 2]]

Show answer & explanation

Correct answer

[[1, 2], [2, 4]]

Explanation

The outer loop iterates y through [1, 2], and the inner loop creates lists by multiplying each x (1, 2) by y, resulting in [[1, 2], [2, 4]].

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All 40 List Comprehensions questions

  1. 1.What is the primary purpose of using list comprehensions in Python?
  2. 2.Predict the output:
  3. 3.What is the basic syntax structure of a list comprehension in Python?
  4. 4.Predict the output:
  5. 5.What is the main advantage of list comprehensions compared to traditional for loops?
  6. 6.Predict the output:
  7. 7.What does a list comprehension with a condition filter accomplish?
  8. 8.Predict the output:
  9. 9.What does the following code demonstrate:
  10. 10.Predict the output:
  11. 11.What is the equivalent traditional for loop for the list comprehension [x**2 for x in range(5)]?
  12. 12.Predict the output:
  13. 13.What type of iterable can be used in a list comprehension?
  14. 14.Predict the output:
  15. 15.What does a list comprehension return compared to a regular for loop?
  16. 16.What is the primary purpose of using list comprehensions in Python instead of traditional for loops?
  17. 17.Predict the output of the following list comprehension that Hari wrote to filter even numbers from a range
  18. 18.What will be the result when Prasath executes this list comprehension that transforms and filters a list of numbers?
  19. 19.How would you use a list comprehension with a conditional expression to create a list where each element is either the number itself or its…
  20. 20.What is the output of this list comprehension written by Vikram that works with nested iteration?
  21. 21.Predict what this list comprehension produces when Anjali applies string operations to transform a list of words
  22. 22.What does this list comprehension do when Rohan uses it to process a list of tuples containing coordinates?
  23. 23.Explain how a list comprehension with multiple if conditions filters elements differently compared to using a single condition
  24. 24.What is the output when Deepak runs this list comprehension that uses multiple filtering conditions?
  25. 25.How would you convert a list of strings to a list of their lengths using a list comprehension in a single line?
  26. 26.What is the primary difference between a list comprehension and a generator expression in terms of memory usage and evaluation?
  27. 27.Predict the output of this complex list comprehension that Hari created with nested loops and conditional logic
  28. 28.What will be the result when Prasath executes this list comprehension that flattens a nested list structure?
  29. 29.How would you use a list comprehension to create a dictionary-like structure where keys are numbers and values are their squares?
  30. 30.What does this list comprehension produce when Vikram applies it to create a Cartesian product with filtering?
  31. 31.Predict the output when Anjali runs this list comprehension that uses nested conditionals with a ternary operator
  32. 32.What is the output of this list comprehension that Rohan uses to transform and filter strings based on multiple criteria?
  33. 33.How would you use a list comprehension to create a list that removes duplicate elements while preserving order from an original list?
  34. 34.What will this list comprehension with complex nested logic produce when Deepak executes it?
  35. 35.What is the difference in behavior between using a list comprehension with a filter function versus using the built-in filter() function…
  36. 36.What is the primary purpose and syntax of list comprehensions in Python, and how do they differ from traditional for loops?
  37. 37.What will be the output when Hari executes the following list comprehension that squares all even numbers from 1 to 10?
  38. 38.How does nesting multiple for loops within a single list comprehension work, and what is the order of iteration?
  39. 39.What will Prasath observe as the output when executing this nested list comprehension that creates pairs of numbers?
  40. 40.What is the bug in Vikram's list comprehension code that attempts to create a list of tuples containing numbers and their squares, but only…