Java Program to Find sum of Digits

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Java Program to Find sum of Digits

To Find sum of digits means add all the digits of any number, for example we take any number like 358. Its sum of all digits is 3+5+8=16. Using given code we can easily design this program.

Example

import java.util.Scanner;
class Sumofdigit
{
public static void main(String[] args) 
{
int a,no,sum=0;
Scanner s=new Scanner(System.in);
System.out.println("Enter any number: ");
no=s.nextInt();
while(no>0)
{
a=no%10;
no=no/10;
sum=sum+a;
}
System.out.println("Sum of Digits :"+sum);
}
}

Output

Enter Value in a :
10
Enter Value in b :
20
Value in a : 20
Value in b : 10

Syntax to compile and run java program

Syntax

for compile -> c:/javac Sumofdigit.java
for run -> c:/java Sumofdigit

Explnation of Code

  • Scanner s=new Scanner(System.in): are used for receive input from keyboard.
  • nextInt(): method are used for get integer type value from keyboard.
  • System.out.println("....."): are used for display message on screen or console.

Explanation of program

a=no%10;

Here we find remainder of given number, using Modulo Operator we find remainder of any number, Using this step we get only last digits.

a=no/10;

Here After dividing any number by 10 we get all digits except last digits.

Sum=Sum+a;;

Using this statement we find sum of all digits. In first iteration it add 0 and last digits and store in Sum variable, in second iteration it add Previous sum values and last digits of new number and again store in Sum variable, and so on upto while condition is not false.


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