Python Tutorials

Python Programs

How to Iterate over a Two Dimensional List in Python


How to Iterate over a Two Dimensional List in Python ?

Answer

To iterate over a Two-Dimensional List in Python, you can use nested for loops, with an outer loop iterating over rows and an inner loop iterating over columns. The outer loop iterates over each row of the 2D list, while the inner loop iterates over each element in the current row.



✐ Examples

1 Iterate over a 2D List of Integers

In this example,

  1. We declare a 2D list using list comprehension or by manually adding lists to a parent list.
  2. We iterate over the rows of the 2D list using the outer loop.
  3. Inside the outer loop, we iterate over the elements of each row using the inner loop.
  4. We print each element to the console.

Python Program

matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]]

for row in matrix:
    for element in row:
        print(element, end=' ')
    print()

Output

1 2 3 
4 5 6 
7 8 9 

2 Iterate over a 2D List of Strings

In this example,

  1. We declare a 2D list using list comprehension or by manually adding lists to a parent list.
  2. We iterate over the rows of the 2D list using the outer loop.
  3. Inside the outer loop, we iterate over the elements of each row using the inner loop.
  4. We print each element to the console.

Python Program

matrix = [['apple', 'banana'], ['cherry', 'orange']]

for row in matrix:
    for element in row:
        print(element, end=' ')
    print()

Output

apple banana 
cherry orange 

Summary

In this tutorial, we learned How to Iterate over a Two Dimensional List in Python language with well detailed examples.




More Python Lists Tutorials

  1. How to create an Empty List in Python ?
  2. How to Initialize a List in Python ?
  3. How to Get Length of a List in Python ?
  4. How to create a List of size N in Python ?
  5. How to create a List of Numbers from 1 to N in Python ?
  6. How to create a List of Strings in Python ?
  7. How to create a List of Empty Lists in Python ?
  8. How to Access Elements in a List in Python ?
  9. How to get Element in a List at a Specific Index in Python ?
  10. How to get First Element in a List in Python ?
  11. How to get Last Element in a List in Python ?
  12. How to Iterate Over a List in Python ?
  13. How to Iterate Over a List with Index in Python ?
  14. How to Iterate Over a List in Reverse Order in Python ?
  15. How to check if a List is Empty in Python ?
  16. How to check if a List is Not Empty in Python ?
  17. How to get Sub List in Python ?
  18. How to get the Index of Specified Element in a List in Python ?
  19. How to check if a Specific Element is present in the List in Python ?
  20. How to check if a List contains all the elements of Another List in Python ?
  21. How to count the Number of Occurrences of Specific Element in the List in Python ?
  22. How to find the Element with Maximum Number of Occurrences in a List in Python ?
  23. How to find the Element with Minimum Number of Occurrences in a List in Python ?
  24. How to Sort a List in Python ?
  25. How to Sort a List in Ascending Order in Python ?
  26. How to Sort a List in Descending Order in Python ?
  27. How to create a Two Dimensional List in Python ?
  28. How to Iterate over a Two Dimensional List in Python ?
  29. How to create a Three Dimensional List in Python ?
  30. How to Copy a List in Python ?
  31. How to deep Copy a List in Python ?
  32. How to Split a List in Python ?
  33. How to Join Lists in Python ?
  34. How to Append an Element to a List in Python ?
  35. How to Insert an Element at Specific Index in a List in Python ?
  36. How to Append a List to another List in Python ?
  37. How to Concatenate Two Lists in Python ?
  38. How to check if Two Lists are Equal in Python ?
  39. How to check if Two Lists have Same Elements (Regardless of Order) in Python ?
  40. How to Convert a List of Integers to a List of Strings in Python ?
  41. How to Convert a List of Strings to a List of Integers in Python ?
  42. How to Convert a List of Floats to a List of Strings in Python ?
  43. How to Convert a List of Strings to a List of Floats in Python ?
  44. How to Reverse a List in Python ?
  45. How to Shuffle a List in Python ?
  46. How to Slice a List in Python ?
  47. How to Slice First N Elements from a List in Python ?
  48. How to Slice Last N Elements from a List in Python ?
  49. How to Rotate Elements in a List in Python ?
  50. How to Filter Elements of a List based on a Condition in Python ?
  51. How to Remove Duplicates in a List in Python ?
  52. How to Remove Element at a Specific Index from a List in Python ?
  53. How to Remove Specific Element from a List in Python ?
  54. How to Remove Element from List based on a Condition in Python ?
  55. How to Sort a List of Strings in Dictionary Order in Python ?
  56. How to Concatenate Strings in List in Python ?
  57. How to create a List of Lists in Python ?
  58. How to create a List of Dictionaries in Python ?
  59. How to create a List of Sets in Python ?
  60. How to create a List of Tuples in Python ?