__Description:__
Sum of the individual digits means
adding all the digits of a number

Ex: 123 sum of digits is 1+2+3=6

__Algorithm:__
Step 1: start

Step 2: read n

Step 3: initialize the s=0

Step 4: if n<0 goto Step 7

Step 5: if n!=0 goto Step 6 else goto step 7

Step 6: store n%10 value in p

Add
p value to s

Assign
n/10 value to n

Goto
Step 5

Step 7: print s

Step 8:stop

__Program:__
#include<stdio.h>

main()

{

int n,s,p;

clrscr();

printf("enter
the vaue for n:\n");

scanf("%d",&n);

s=0;

if(n<0)

printf("The
given number is not valid");

else

{

while(n!=0) /* check the given value =0 or not */

{

p=n%10;

n=n/10;

s=s+p;

}

printf("sum
of individual digits is %d",s);

}

getch();

}

__Output:__
1.Enter the value for n: 333

Sum of individual
digits is 9

2.Enter the value for n: 4733

Sum of individual
digits is 17

3. Enter the value for n: -111

The given number is
not valid

**The program is error free**

__Conclusion :__

__VIVA QUESATIONS:__
1) What is the mean of sum of the individual digits?

Ans: Sum of the
individual digits means adding each digit in a number

2) What is positive integer?

Ans: if the integer
value is grater than zero then it is called positive integer

3) Define preprocessor ?

Ans: Before compiling a process called preprocessing is done
on the source code by a program called the preprocessor.

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