merge arrays

function  solve(arr1, arr2){

    let arr3 = [];

    for (let i = 0; i < arr1.length; i++) {

        if (i % 2 == 0) {
            let number = Number(arr1[i]) + Number(arr2[i]);
            arr3.push(number);
        } else {
            let text = arr1[i] + arr2[i];
            arr3.push(text);
        }
    }

    console.log(arr3.join(' - '))
}