Sum of Array

Sum of Array

Problem Statement

Given an integer array Arr[ ] of size N. The task is to find sum of it.

Example 1

Input :
N = 4
Arr[] = {1, 2, 3, 4}

Output : 10

Explanation :
1 + 2 + 3 + 4 = 10.

Example 2

Input :
N = 3
Arr[] = {1, 3, 3}

Output : 7

Explanation :
1 + 3 + 3 = 7.

Task

Complete the function sum() which takes array arr and single integer n, as input parameters and returns an integer denoting the answer. You don't to print answer or take inputs.

Expected Time Complexity : O(n)
Expected Auxiliary Space : O(1)

Constraints :
1 <= N <= 10⁵
1 <= Arr[i] <= 10⁴

Solutions

Java Solution

class Solution {
    int sum(int arr[], int n) {
        // code here
        int sum = 0;
        for(int i=0; i<n; i++) {
            sum = sum + arr[i];
        }
        return sum;
    }
}
        
    

C++ Solution

class Solution {
public:
 // function to return sum of elements
 // in an array of size n
 int sum(int arr[], int n) {
     int sum = 0;
     for(int i=0; i<n ; i++) {
         sum = sum + arr[i];
     }
     return sum;
 	}
};