Python: Sum of all items of a given array of integers where each integer is multiplied by its index

Python Basic - 1: Exercise-100 with Solution

Write a Python program to compute the sum of all items in a given array of integers where each integer is multiplied by its index. Return 0 if there is no number.

Sample Solution:

Python Code:

def sum_index_multiplier(nums):
	return sum(j*i for i, j in enumerate(nums))

print(sum_index_multiplier([1,2,3,4]))
print(sum_index_multiplier([-1,-2,-3,-4]))
print(sum_index_multiplier([]))

Sample Output:

20
-20
0

Pictorial Presentation:

Flowchart:

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

Previous: Write a Python program to find the position of the second occurrence of a given string in another given string.
Next: Write a Python program to find the name of the oldest student from a given dictionary containing the names and ages of a group of students.