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Array Average
Array Average
Description:
Calculate the average value of all integer numbers in a given array, considering both positive and negative integers. The array may contain a mix of positive and negative integers.
Example 1:
Input: arr = [1, 5, -3, 2, 0, -8, 4]
Output: 0.5714285714285714
Explanation: Average of all integer numbers (1 + 5 – 3 + 2 + 0 – 8 + 4) = 0.57
Example 2:
Input: arr = [-2, -7, 10, 4, -6, 8]
Output: 1.17
Explanation: Average of all integer numbers (-2 – 7 + 10 + 4 – 6 + 8) = 1.17
Constraints:
The array length |arr| is at least 1 and at most 10^5. Elements in the array are integers ranging from -10^9 to 10^9.
Java Code:
public class HackerAlgo {
public static double calculateAverage(int[] arr) {
if (arr.length == 0) {
return 0; // Avoid division by zero
}
int sum = 0;
for (int num : arr) {
sum += num;
}
return (double) sum / arr.length;
}
public static void main(String[] args) {
int[] exampleArr = {1, 5, -3, 2, 0, -8, 4};
double result = calculateAverage(exampleArr);
System.out.println(result);
}
}
Python Code:
def calculate_average(arr):
if not arr:
return 0 # Avoid division by zero
return sum(arr) / len(arr)
# Example usage
example_arr = [1, 5, -3, 2, 0, -8, 4]
result = calculate_average(example_arr)
print(result)
C++ Code:
#include <iostream>
#include <vector>
class HackerAlgo {
public:
static double calculateAverage(const std::vector<int>&arr) {
if (arr.empty()) {
return 0; // Avoid division by zero
}
int sum = 0;
for (int num : arr) {
sum += num;
}
return static_cast<double>(sum) / arr.size();
}
};
int main() {
// Example usage
std::vector<int>exampleArr = {1, 5, -3, 2, 0, -8, 4};
double result = HackerAlgo::calculateAverage(exampleArr);
std::cout<< result << std::endl;
return 0;
}
JavaScript Code:
class HackerAlgo {
static calculateAverage(arr) {
if (!arr.length) {
return 0; // Avoid division by zero
}
return arr.reduce((acc, num) =>acc + num, 0) / arr.length;
}
}
// Example usage
constexampleArr = [1, 5, -3, 2, 0, -8, 4];
const result = HackerAlgo.calculateAverage(exampleArr);
console.log(result);
