Drag and drop $($or click$)$ to upload files

$5$ points

Constantly ask the user for a number. End the program when zero is entered.

Test Case $1$

Enter zero to exit: $\frac{?}{?}$

$2$

Enter zero to exit: $\frac{?}{?}$

$4$

Enter zero to exit: $\frac{?}{?}$

$6$

Enter zero to exit:

$8$

Enter zero to exit: $\frac{?}{?}$

$0$