HackerRank Simple Array Sum Problem Solution

 


Here's a concise introduction to the Simple Array Sum problem solution on HackerRank:

**Problem Overview:**

In the Simple Array Sum problem, you are given an array of integers. Your task is to find the sum of all the integers in the array.


**Solution Approach:**

To solve this problem, we iterate through the array, adding each element to a running total. The final total represents the sum of all the integers in the array.


**Pseudocode:**

1. Initialize a variable sum to 0.

2. Iterate through each element in the array.

3. Add each element to the sum.

4. After iterating through all elements, return the sum.

```


**Implementation (in Python):**

```python

def simple_array_sum(arr):

    sum = 0

    for num in arr:

        sum += num

    return sum


# Example usage:

arr = [1, 2, 3, 4, 5]

result = simple_array_sum(arr)

print("The sum of the array is:", result)

```

**Explanation:**

In the provided implementation, we initialize a variable `sum` to 0. We then iterate through each element in the array `arr`, adding each element to the `sum` variable. Finally, we return the `sum`, which contains the total sum of all elements in the array. This solution has a time complexity of O(n), where n is the number of elements in the array. This overview gives a brief explanation of the problem, the approach to solve it, and provides both pseudocode and an implementation example in Python.

HackerRank Simple Array Sum Problem Solution in C

Sure, here's an example solution to the Simple Array Sum problem on HackerRank in several programming languages:

1. **Python**:
```python
def simple_array_sum(arr):
    return sum(arr)

# Example usage:
arr = [1, 2, 3, 4, 5]
result = simple_array_sum(arr)
print("The sum of the array is:", result)
```

2. **Java**:

```java
public class Main {
    public static int simpleArraySum(int[] arr) {
        int sum = 0;
        for (int num : arr) {
            sum += num;
        }
        return sum;
    }

    public static void main(String[] args) {
        int[] arr = {1, 2, 3, 4, 5};
        int result = simpleArraySum(arr);
        System.out.println("The sum of the array is: " + result);
    }
}
```

3. **C++**:

```cpp
#include <iostream>
#include <vector>

using namespace std;

int simpleArraySum(vector<int>& arr) {
    int sum = 0;
    for (int num : arr) {
        sum += num;
    }
    return sum;
}

int main() {
    vector<int> arr = {1, 2, 3, 4, 5};
    int result = simpleArraySum(arr);
    cout << "The sum of the array is: " << result << endl;
    return 0;
}
```

4. **JavaScript**:

```javascript
function simpleArraySum(arr) {
    return arr.reduce((sum, num) => sum + num, 0);
}

// Example usage:
const arr = [1, 2, 3, 4, 5];
const result = simpleArraySum(arr);
console.log("The sum of the array is:", result);
```

These examples provide solutions to the Simple Array Sum problem in Python, Java, C++, and JavaScript. Each solution iterates through the array, summing up its elements, and returns the total sum.

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