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Count Negative Numbers in Array
Count Negative Numbers in Array
Description:
Count the number of negative numbers in the given array. Do not use any inbuilt methods.
Example 1:
Input: arr = [1, 5, -3, 2, 0, -8, 4]
Output: Sum of positive numbers = 37
Explanation: There are 2 negative numbers in the array.
Example 2:
Input: arr = [-2, -7, 10, 4, -6, 8]
Output: 3
Explanation: There are 3 negative numbers in the array.
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 int countNegativeNumbers(int[] arr) {
int count = 0;
for (int num : arr) {
if (num< 0) {
count++;
}
}
return count;
}
public static void main(String[] args) {
int[] exampleArr = {1, 5, -3, 2, 0, -8, 4};
int result = countNegativeNumbers(exampleArr);
System.out.println(result);
}
}
Python Code:
def count_negative_numbers(arr):
return sum(1 for num in arr if num< 0)
# Example usage
example_arr = [1, 5, -3, 2, 0, -8, 4];
result = count_negative_numbers(example_arr)
print(result)
C++ Code:
#include <iostream>
#include <vector>
class HackerAlgo {
public:
static int countNegativeNumbers(const std::vector<int>&arr) {
int count = 0;
for (int num : arr) {
if (num< 0) {
count++;
}
}
return count