Java program to calculate sum of digits of a given number

The following is the java program to calculate sum of digits in a given number. It is easy to calculate sum of digits. first we will read the input number by using buffered reader and we will store that number in a variable. Later we will extract each digit by using  %10. Every time it returns last digit of a number. This process is done until all digits are covered.

/* Simple Java Program To Find the Sum of digits of number */

import java.io.*;

class calcsum

{

public static void main(String args[]) throws Exception

{

int sum, i,a,d;

System.out.println("Enter A Number ");

BufferedReader k = new BufferedReader(new InputStreamReader(System.in));

a = Integer.parseInt(k.readLine());

sum = 0;

while(a!=0)

{

d = a%10;

a = a/10;

sum=sum + d;

}

System.out.println("Sum of Digits :"+sum);

}

}

output: