如何将所有项目保留在数组函数中？ 使用Javascript

Question

How would I put all the numbers inputted in the function getNum() , into the finalArr Array , without moving var finalArr = []; outside the function it is in? At the moment, no matter how many cycles I run the script, it only displays the very last number I entered.

function getNum () {

     do {    
         number = Number(prompt("Enter a number:"));
     }
     while (number < 0);

     return number;

}

function finalArray () {

    var finalArr = [];
    finalArr.unshift(number);
    alert(finalArr);

    return;
}

do {
     getNum();
     finalArray();
     var no = prompt("Enter n to stop");
}
while (no != "n");

Answer 1

您必须在getNum（）方法中调用finalArry（）方法，并将其从do循环中删除。

Answer 2

Why don't you use a recursive function instead of a while loop?

Look at the next code:

 var array = []; function getNum () { var no = prompt("Enter n to stop"); if (no === "n") { console.log("the final array is"); console.log(array); } else { array.push(no); getNum(); } } getNum(); 

EDIT: I don't understand why you want to declare the Array inside the function, every variable declared inside a function lives just in that scope. But if it is necessary for you, you could pass the Array value to the function, declare the Array inside the function getting the value that you have passed and return the resulting Array , it is a bit tricky but it works:

 var array; function finalArray(array, number) { var finalArr = array || []; finalArr.push(number); return finalArr; } function getNum() { var no = prompt("Enter a number. Enter n to stop"); if (no === "n") { console.log("the final array is"); console.log(array); } else { array = finalArray(array, +no); getNum(); } } getNum();