# Creating separate arrays for even and odd numbers

This is beginner level. I am trying to create separate arrays for odd and even numbers from the parent array. Below the code:

``````
const arr = [22, 33, 44, 55, 66]
let even = []
let odd = []

function separateArray(arr) {

let j, k

for( let i = 0; i < arr.length; i++ ) {

if( arr[i]%2 === 0 ){

even[j] = arr[i]
j++

}else {

odd[k] = arr[i]
k++

}

}
}

separateArray(arr)

for( let i = 0; i < even.length; i++ ) {

console.log(even[i])

}
``````

I tried calling the function `separateArray` and then log the even numbers in the console. But it doesn’t display anything.

### >Solution :

The reason why you are not seeing anything in the console is because you have not initialized the values of `j` and `k`.
In JavaScript, accessing an undefined variable will result in a ReferenceError. You need to initialize `j` and `k` to 0 before using them as array indices:

``````const arr = [22, 33, 44, 55, 66];
let even = [];
let odd = [];

function separateArray(arr) {
let j = 0,
k = 0;
for (let i = 0; i < arr.length; i++) {
if (arr[i] % 2 === 0) {
even[j] = arr[i];
j++;
} else {
odd[k] = arr[i];
k++;
}
}
}

separateArray(arr);

for (let i = 0; i < even.length; i++) {
console.log(even[i]);
}``````