Python: Pair up the consecutive elements of a given list

Last update on April 19 2025 13:01:19 (UTC/GMT +8 hours)

Pair Consecutive Elements in List

Write a Python program to pair consecutive elements of a given list.

Visual Presentation:

Sample Solution:

Python Code:

# Define a function 'pair_consecutive_elements' that pairs up consecutive elements in a list.
def pair_consecutive_elements(lst):
    # Use a list comprehension to iterate over each index 'i' in the range up to the second-to-last index.
    # For each 'i', create a sublist containing the elements at index 'i' and 'i + 1' in the original list.
    result = [[lst[i], lst[i + 1]] for i in range(len(lst) - 1)]
    return result

# Create a list 'nums' containing integers.
nums = [1, 2, 3, 4, 5, 6]

# Print a message indicating the original list.
print("Original lists:")
# Print the original list of integers.
print(nums)

# Print a message indicating the purpose of the following line of code.
print("Pair up the consecutive elements of the said list:")
# Call the 'pair_consecutive_elements' function to create pairs of consecutive elements in the list.
print(pair_consecutive_elements(nums))

# Create a list 'nums' containing integers.
nums = [1, 2, 3, 4, 5]

# Print a message indicating the original list.
print("\nOriginal lists:")
# Print the original list of integers.
print(nums)

# Print a message indicating the purpose of the following line of code.
print("Pair up the consecutive elements of the said list:")
# Call the 'pair_consecutive_elements' function to create pairs of consecutive elements in the list.
print(pair_consecutive_elements(nums)) 

Sample Output:

Original lists:
[1, 2, 3, 4, 5, 6]
Pair up the consecutive elements of the said list:
[[1, 2], [2, 3], [3, 4], [4, 5], [5, 6]]

Original lists:
[1, 2, 3, 4, 5]
Pair up the consecutive elements of the said list:
[[1, 2], [2, 3], [3, 4], [4, 5]]

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to pair consecutive elements in a list and compute the sum of each pair.
• Write a Python program to pair consecutive elements in a list only if the first element is less than the second.
• Write a Python program to pair consecutive elements in a list and output the pairs as tuples.
• Write a Python program to pair every two consecutive elements in a list and then swap the order of each pair.

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