Given an array arr of valid finite numbers, return the sum of all elements.
Examples
Input: arr = [1, 2, 3]
Output: 6
Input: arr = [5]
Output: 5
Input: arr = []
Output: 0
Input: arr = [-1, 5, -4]
Output: 0
Constraints
- Input is always a valid array.
- All elements are guaranteed to be finite numbers.
- No need to validate for invalid inputs.
Function Signature
function sumArray(arr) {
// Your code here
}
Test Cases
- Empty: []
- Single element: [5], [0]
- Small: [1, 2], [1, 2, 3]
- Mixed values: [-1, 2, -3, 4], [10, -5, 5, -10]
- Large sets: [1..10], [10, 20, 30, 40, 50]
- With decimals: [1.5, 2.5, 3], [-1.2, 2.2]
