Python program to compute the power by Index element in List

When it is required to compute the power by index element in a list, we can use iteration along with the ** operator to raise each element to the power of its index position.

Understanding the Concept

In this operation, each element at index i is raised to the power i. For example, element at index 0 becomes element ** 0 = 1, element at index 1 becomes element ** 1 = element, and so on.

Using enumerate() with List Iteration

The most straightforward approach uses enumerate() to get both index and element ?

my_list = [62, 18, 12, 63, 44, 75]

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

my_result = []

for my_index, elem in enumerate(my_list):
    my_result.append(elem ** my_index)

print("The result is:")
print(my_result)

The list is:
[62, 18, 12, 63, 44, 75]
The result is:
[1, 18, 144, 250047, 3748096, 2373046875]

Using List Comprehension

A more concise approach using list comprehension ?

my_list = [62, 18, 12, 63, 44, 75]

my_result = [elem ** idx for idx, elem in enumerate(my_list)]

print("Original list:", my_list)
print("Power by index:", my_result)

Original list: [62, 18, 12, 63, 44, 75]
Power by index: [1, 18, 144, 250047, 3748096, 2373046875]

Using range() with Index Access

Alternative approach using range() and direct index access ?

my_list = [62, 18, 12, 63, 44, 75]

my_result = []

for i in range(len(my_list)):
    my_result.append(my_list[i] ** i)

print("Original list:", my_list)
print("Result:", my_result)

Original list: [62, 18, 12, 63, 44, 75]
Result: [1, 18, 144, 250047, 3748096, 2373046875]

How It Works

The calculation for each element follows this pattern:

• Index 0: 62 ** 0 = 1 (any number to power 0 equals 1)
• Index 1: 18 ** 1 = 18 (any number to power 1 equals itself)
• Index 2: 12 ** 2 = 144
• Index 3: 63 ** 3 = 250047
• Index 4: 44 ** 4 = 3748096
• Index 5: 75 ** 5 = 2373046875

Comparison

Conclusion

Use list comprehension with enumerate() for the most Pythonic approach. The enumerate() method provides clear, readable code when you need both index and element values for computation.