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C/C++ Program to find sum of elements in a given array

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  • Difficulty Level : Basic
  • Last Updated : 13 Jun, 2022

Given an array of integers, find sum of its elements. Examples :

Input : arr[] = {1, 2, 3}
Output : 6
1 + 2 + 3 = 6

Input : arr[] = {15, 12, 13, 10}
Output : 50

CPP




/* CPP Program to find sum of elements
 in a given array */
#include <bits/stdc++.h>
 
// function to return sum of elements
// in an array of size n
int sum(int arr[], int n)
{
    int sum = 0; // initialize sum
 
    // Iterate through all elements
    // and add them to sum
    for (int i = 0; i < n; i++)
    sum += arr[i];
 
    return sum;
}
 
int main()
{
    int arr[] = {12, 3, 4, 15};
    int n = sizeof(arr) / sizeof(arr[0]);
    printf("Sum of given array is %d", sum(arr, n));
    return 0;
}

Time complexity: O(n)

Auxiliary Space: O(1)

Please refer complete article on Program to find sum of elements in a given array for more details!

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