Java program to compute the sum of digits in a given integer

In this article we will learn to implement a java program to compute the sum of digits in a given integer. A java program is provided below which reads a number from the user and prints out the sum of individual digits in the given number. For example, if the given number is 1234, program prints 10 (1+2+3+4).

Program is as follows:

import java.util.Scanner;

public class Driver
{	
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);
		System.out.println("Enter a number: ");
		int n = input.nextInt();
		int sum = 0;
		while(n != 0)
		{
			sum = sum + (n % 10);
			n = n / 10;
		}
		System.out.println("Sum of the digits in the given number is: " + sum);
		input.close();
	}
}

Input and output for the above program is as follows:

Enter a number: 
1234
Sum of the digits in the given number is: 10

Suryateja Pericherla

Suryateja Pericherla, at present is a Research Scholar (full-time Ph.D.) in the Dept. of Computer Science & Systems Engineering at Andhra University, Visakhapatnam. Previously worked as an Associate Professor in the Dept. of CSE at Vishnu Institute of Technology, India.

He has 11+ years of teaching experience and is an individual researcher whose research interests are Cloud Computing, Internet of Things, Computer Security, Network Security and Blockchain.

He is a member of professional societies like IEEE, ACM, CSI and ISCA. He published several research papers which are indexed by SCIE, WoS, Scopus, Springer and others.