sum odd length of subarray

arr=[1,2,3,4,5]

let oddLength = 1
let sum = 0

while(arr.length >= oddLength) {
    for(let i=0; i<arr.length - oddLength + 1; i++) {
        for(let j=i; j<oddLength + i; j++) {
            sum += arr[j]
        }
    }
    

    oddLength += 2
}

...