Python Program to find the cube of each list element

Finding the cube of each list element is a common operation in Python. We can achieve this using several approaches: simple iteration with append(), list comprehension, or the map() function.

Method 1: Using Simple Iteration

This approach uses a for loop to iterate through each element and append the cubed value to a new list ?

numbers = [45, 31, 22, 48, 59, 99, 0]

print("The list is:")
print(numbers)

cubed_numbers = []
for num in numbers:
    cubed_numbers.append(num * num * num)

print("The resultant list is:")
print(cubed_numbers)

The list is:
[45, 31, 22, 48, 59, 99, 0]
The resultant list is:
[91125, 29791, 10648, 110592, 205379, 970299, 0]

Method 2: Using List Comprehension

List comprehension provides a more concise and Pythonic way to create the cubed list ?

numbers = [45, 31, 22, 48, 59, 99, 0]

print("The list is:")
print(numbers)

cubed_numbers = [num ** 3 for num in numbers]

print("The resultant list is:")
print(cubed_numbers)

The list is:
[45, 31, 22, 48, 59, 99, 0]
The resultant list is:
[91125, 29791, 10648, 110592, 205379, 970299, 0]

Method 3: Using map() Function

The map() function applies a lambda function to each element of the list ?

numbers = [45, 31, 22, 48, 59, 99, 0]

print("The list is:")
print(numbers)

cubed_numbers = list(map(lambda x: x ** 3, numbers))

print("The resultant list is:")
print(cubed_numbers)

The list is:
[45, 31, 22, 48, 59, 99, 0]
The resultant list is:
[91125, 29791, 10648, 110592, 205379, 970299, 0]

Comparison

Explanation

• The original list contains integers that need to be cubed.

• Each method creates a new list with cubed values.

• Cubing is performed using num * num * num or num ** 3.

• List comprehension is generally preferred for its conciseness and readability.

Conclusion

List comprehension is the most Pythonic approach for cubing list elements due to its conciseness and readability. Use simple iteration when you need more complex logic or are teaching basic concepts.