long i = Convert.ToInt64(TextBox1.Text);//123
int len = (TextBox1.Text).Length; //2
long sum=0;
for (int j = 0; j < len; j++) //3 times
{
sum += i % 10; //3
i = i / 10; //123/10=12.3 =12 3 is removed
}
TextBox1.Text = sum.ToString();
fibinocci series or sum of digits of an integer
07 Tuesday Aug 2012
Posted sum of integers
in