JavaScript: Summing Array Elements

This challenge will test your ability to work with arrays in JavaScript and perform a fundamental operation: summing all the numerical values within an array. This skill is crucial for various data processing tasks, from calculating totals in financial applications to aggregating metrics in analytics.

Problem Description

Your task is to create a JavaScript function that accepts an array of numbers and returns the sum of all its elements.

Key Requirements:

• The function should accept a single argument: an array of numbers.
• The function should return a single number, which is the sum of all elements in the input array.
• The function should handle arrays containing positive, negative, and zero values.

Expected Behavior:

• If the input array is empty, the function should return 0.
• The function should correctly sum all numbers, irrespective of their order or sign.

Edge Cases to Consider:

• An empty input array.
• An array containing only zero(s).
• An array containing both positive and negative numbers.

Examples

Example 1:

Input: [1, 2, 3, 4, 5]
Output: 15
Explanation: 1 + 2 + 3 + 4 + 5 = 15

Example 2:

Input: [-1, 0, 1]
Output: 0
Explanation: -1 + 0 + 1 = 0

Example 3:

Input: [100, -50, 25, -75]
Output: 0
Explanation: 100 + (-50) + 25 + (-75) = 0

Example 4:

Input: []
Output: 0
Explanation: An empty array should result in a sum of 0.

Constraints

• The input will always be an array.
• The elements within the array will be numbers (integers or floating-point).
• The array size can range from 0 to 1000 elements.

Notes

Consider different approaches to iterate through the array and accumulate the sum. Built-in array methods in JavaScript might offer elegant solutions.