Written by Sai Sameera Thota on January 16, 2013 in Java > Programming

Java Program to find Sum of Individual Digits


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This program illustrates how to perform the sum of individual digits in Java, The program takes a number as input and displays the sum of the individual digits in the number as output.
For example,
input : 427
output: 4 + 2 + 7 = 13

The variables sum and num are initialized to zero.
The modulo operator(%) gives the remainder of the given digit. In the given example, 427 % 10 = 7. The remainder 7 is added to the sum and the value is stored in the variable sum. In the next step the number is divided by 10 i.e, 427/10 = 42. The loop iterates till the value of n becomes zero.

//Sum of individual digits of a number
import java.io.*;
class sum_digits 
	public static void main(String[] args) throws IOException
		BufferedReader br =  new BufferedReader(new InputStreamReader(System.in));
		System.out.print("\nEnter a number : ");
		int n = Integer.parseInt(br.readLine());
		int num = 0,sum = 0;
			num = n%10;
			sum = sum + num;
			n = n/10;
		System.out.print("\nSum of individual digits : "+sum);


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