Sum numbers using loop

问题

My objective: write an application that uses while loop to get 20 inputs from a user and displays the sum of all those numbers.

I get how to do the while loop but I don't know how to get the sum of all those numbers (because the variable will be the same). Here is what I have so far:

Scanner Numb = new Scanner (System.in); 
int count = 0;
while (count<20) {
    System.out.println("Enter number: ");
    int numb = Numb.nextInt();
    count++;

回答1:

use a common variable to store sum

int sum = 0;
int count = 0;
while (count<20) {
    System.out.println("Enter number: ");
    int numb = Numb.nextInt();
    sum = sum+numb;
    count++;
}
System.out.println("sum is "+sum);

回答2:

you need another variable to add it to that is outside the while loop.

来源：https://stackoverflow.com/questions/22102720/sum-numbers-using-loop