14. Print Every N-th Element from an Array

function solve(arr, num) {
    let result = [];
    if (num < arr.length) {
        for (let i = 0; i < arr.length; i += num) {
            result.push(arr[i]);
        }
    } else {
        result = [arr[0],];
    }
    return result;
}

solve(['5', '20', '31', '4', '20'], 2);
solve(['1', '2', '3', '4', '5'], 6);