Python: Find the sum of the even elements that are at odd indices
Python Programming Puzzles: Exercise-63 with Solution
Write a Python program to find the sum of the even elements that are at odd indices in a given list.
Input: [1, 2, 3, 4, 5, 6, 7] Output: 12 Input: [1, 2, 8, 3, 9, 4] Output: 6
Pictorial Presentation:


Sample Solution-1:
Python Code:
#License: https://bit.ly/3oLErEI
def test(nums):
return sum(i for i in nums[1::2] if i % 2 == 0)
nums = [1, 2, 3, 4, 5, 6, 7]
print("Original list of numbers:")
print(nums)
print("Sum of the even elements of the said list that are at odd indices:")
print(test(nums))
nums = [1, 2, 8, 3, 9, 4]
print("\nOriginal list of numbers:")
print(nums)
print("Sum of the even elements of the said list that are at odd indices:")
print(test(nums))
Sample Output:
Original list of numbers: [1, 2, 3, 4, 5, 6, 7] Sum of the even elements of the said list that are at odd indices: 12 Original list of numbers: [1, 2, 8, 3, 9, 4] Sum of the even elements of the said list that are at odd indices: 6
Flowchart:

Visualize Python code execution:
The following tool visualize what the computer is doing step-by-step as it executes the said program:
Sample Solution-2:
Python Code:
def test(nums):
return sum([nums[i] for i in range(len(nums)) if i % 2 == 1 and nums[i] % 2 == 0])
nums = [1, 2, 3, 4, 5, 6, 7]
print("Original list of numbers:")
print(nums)
print("Sum of the even elements of the said list that are at odd indices:")
print(test(nums))
nums = [1, 2, 8, 3, 9, 4]
print("\nOriginal list of numbers:")
print(nums)
print("Sum of the even elements of the said list that are at odd indices:")
print(test(nums))
Sample Output:
Original list of numbers: [1, 2, 3, 4, 5, 6, 7] Sum of the even elements of the said list that are at odd indices: 12 Original list of numbers: [1, 2, 8, 3, 9, 4] Sum of the even elements of the said list that are at odd indices: 6
Flowchart:

Visualize Python code execution:
The following tool visualize what the computer is doing step-by-step as it executes the said program:
Python Code Editor :
Have another way to solve this solution? Contribute your code (and comments) through Disqus.
Previous: Find the dictionary key whose case is different than all other keys.
Next: Find the string consisting of all the words whose lengths are prime numbers.
What is the difficulty level of this exercise?
Test your Programming skills with w3resource's quiz.
Python: Tips of the Day
Clamps num within the inclusive range specified by the boundary values x and y:
Example:
def tips_clamp_num(num,x,y): return max(min(num, max(x, y)), min(x, y)) print(tips_clamp_num(2, 4, 6)) print(tips_clamp_num(1, -1, -6))
Output:
4 -1
- New Content published on w3resource:
- HTML-CSS Practical: Exercises, Practice, Solution
- Java Regular Expression: Exercises, Practice, Solution
- Scala Programming Exercises, Practice, Solution
- Python Itertools exercises
- Python Numpy exercises
- Python GeoPy Package exercises
- Python Pandas exercises
- Python nltk exercises
- Python BeautifulSoup exercises
- Form Template
- Composer - PHP Package Manager
- PHPUnit - PHP Testing
- Laravel - PHP Framework
- Angular - JavaScript Framework
- Vue - JavaScript Framework
- Jest - JavaScript Testing Framework