How many Odd and Even number are the in a array

Question

I have created an Array with some numbers. I want to find out how many even, and how many odd numbers it is in this Array. I have to print it out like this: (this is j

Answer 1

You were adding arr.length which is the array length. Instead you should simply increment the number

var tall = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50];

liste(tall);

function liste(arr) {
  var sumOdd = 0;
  var sumPar = 0;

  for (var i = 0; i < arr.length; i++) {
    if (arr[i] % 2 === 0) {
      sumPar++;
    } else {
      sumOdd++;
    }
  }
  
  console.log("Odd : " + sumOdd);
  console.log("Par : " + sumPar);
}

Answer 2

You could iterate with Array#reduce and count only the odds. For the rest just take the difference of the length of the array and the odds.

var tall = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50],
    odd = tall.reduce(function (r, a) { return r + a % 2; }, 0),
    even = tall.length - odd;

console.log('odd', odd);
console.log('even', even);

Answer 3

You always add the complete Length of the array to your variable

Try this instead of sumPar += arr.length;:

sumPar++;