Count of positives - sum of negatives.js

// Given an array of integers.

// Return an array, where the first element is the count of positives numbers and the second element is sum of negative numbers.

// If the input array is empty or null, return an empty array.

// Example
// For input [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, -11, -12, -13, -14, -15], you should return [10, -65].

function countPositivesSumNegatives(input) {
    let res = []
    let countPos =0;
    let countNeg =0;
     
    if(input == null || input.length < 1) { return [];}
  
    for(let i = 0; i < input.length; i++) {
     
        if(input[i] > 0) { countPos ++; } 
      else if(input[i] < 0) { countNeg += input[i]; } 
      } 
    
    res.push(countPos, countNeg);
  
  return res;
  
  }