如何在不使用Break的情况下停止无限提示循环？

Question

I've created an infinite loop with a prompt in order to insert city names into an array as long as you wish, however I would like to stop this infinite loop whenever the user hits cancel in the prompt without using a break .

<script>
    var cities = new Array(); 
    var i=0; 

while(i >= 0){ 
    i++; 
    cities[i] = prompt("Type a City");
    if (cities[i] == null) break; 
document.write("<tr> <td>" + i + "</td> <td>" + cities[i] + "</td> </tr>")  
</script>    

after

if (cities[i] == null) break;

What else could I add other than break ?

Thanks

Answer 1

Just set i to -1 instead of break

Below is the code:

var cities = new Array(); 
var i=0; 

while(i >= 0){ 
    i++; 
    cities[i] = prompt("Type a City");
    if (cities[i] == null) {
       i = -1; 
    } else {
       document.write("<tr> <td>" + i + "</td> <td>" + cities[i] + "</td> </tr>");
    }
}