By | 25.12.2016

# Sum of Digits of a Number using while loop

Write a C++ Program to find Sum of Digits of a Number using while loop. Here’s simple Program to find Sum of Digits of Number using while loop in C++ Programming Language.

Sum of Digits : : Sum of digits means addition of all the digits of any number, for example we take any number like 1234. Its sum of all digits is 1+2+3+4=10. Using given code below, we can easily write c++ program .

Here is source code of the C++ Program to find Sum of Digits of a Number using while loop. The C++ program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.

### SOURCE CODE : :

```/*  C++ Program to find Sum of Digits of a Number using while loop  */

#include<iostream>
using namespace std;

int main()
{
long int a,num,no,sum=0;

//----Enter any number which u want --------
cout<<"Enter any integer :: ";
cin>>num;

no=num;

while(no>0)
{
a=no%10;
no=no/10;
sum=sum+a;
}

cout<<"\nSum of Digits of a Number [ "<<num<<" ] :: "<<sum<<"\n";

return 0;
}```

### Output : :

```/*  C++ Program to find Sum of Digits of a Number using while loop  */

Enter any integer :: 123456

Sum of Digits of a Number [ 123456 ] :: 21

Process returned 0```

Above is the source code for C++ Program to find Sum of Digits of a Number using while loop which is successfully compiled and run on Windows System.The Output of the program is shown above .

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