Sum of Array Elements

function arraySum(nums) {
  let sum = 0;
  for (let num of nums) sum += num;
  return sum;
}
                  

Explanation: We iterate through the array and keep adding each element to a running total.

⏱ O(n) | 💾 O(1)

class Solution {
  public int arraySum(int[] nums) {
    int sum = 0;
    for (int num : nums) sum += num;
    return sum;
  }
}
                  

Explanation: Each element is added once, resulting in linear time complexity.

⏱ O(n) | 💾 O(1)

def array_sum(nums):
    return sum(nums)
                  

Explanation: Python provides a built-in sum function to add all elements of a list.

⏱ O(n) | 💾 O(1)