Calculate sum of long integer!

[Julingo]

Hi!

I´m new to java and just started to learn but have a little problem. What I want to know is how I can get a long integer from the user and then caculate the sum of the separate numbers? I thinking I would use som sort of array and then calculate from there. The thing is I´m use to ada programminglanguage so I understand the problem but don´t really know how to tackle the problem in java.

So if someone could help I would be grateful!

//Viktor

[hardwired]

int n = longInteger;
String s = String.valueOf(n);
Use methods in the String class to get each digit to parse with Integer parseInt method.

[fishtoprecords]

If you are reading from the user, its already a String. No need to make it an Integer that you are not going to use.

With the string, you can just use a for loop to iterate through each character

long sum = 0;
for (int i=0; i < arg.length(); i++) {
   String  c = arg.substring(i,i);
   sum += Integer.valueOf(c);
}

This may not work, I typed it into the forum, not a compiler, but it should get you going. Debug on your own, its part of learning