Calculate the sum of elements in an array
Detailed guide and Python implementation for the 'Calculate the sum of elements in an array' problem.
Problem Statement
Write a function array_sum(arr) that takes a list of integers arr and returns the sum of all elements in the array. If the array is empty, return 0.
- •0 <= len(arr) <= 10^5
- •-10^9 <= arr[i] <= 10^9
Examples
arr = [1, 2, 3, 4, 5]
15
1 + 2 + 3 + 4 + 5 = 15.
arr = [-1, -2, -3]
-6
-1 + (-2) + (-3) = -6.
arr = []
0
Sum of an empty array is 0.
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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