//program
to get the sum of digits of a given number using while loop

void main()

{

int
num,sum=0,a,b;

clrscr();

printf("Enter
any number to get the sum of its digits ");

scanf("%d",&num);

a=num;

while(a>0)

{

b=a%10;

sum=sum+b;

a=a/10;

}

printf("\nThe
sum of digits of %d is %d",num,sum);

getch();

}

**Output**

Enter any number
to get the sum of its digits 1234

The sum of
digits of 1234 is 10

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