Merge Arrays

function mergeArrays(arr1, arr2) {
    let newArray = [];
    let sum = 0;

    for (let i = 0; i < arr1.length; i++) {
        if (i % 2 === 0) {
            sum = Number(arr1[i]) + Number(arr2[i]);
            newArray.push(sum);
        } else {
            newArray.push(arr1[i] + arr2[i]);
        }
    }
    console.log(newArray.join(' - '));
}