Add And Remove

function addAndRemove(arr) {
    let newArr = [];
    let initialNumber = 1;
    for (let i = 0; i < arr.length; i++) {

        if (arr[i] === "add") {
            newArr.push(initialNumber)
        } else {
            newArr.pop(initialNumber);
        }
        initialNumber++;
    }
    if (newArr.length === 0) {
        console.log("Empty");
    }
    console.log(newArr.join(' '));
}