Answer Posted / somasundaram

#include<stdio.h>
#include<conio.h>
void main()
{
unsigned int no;
clrscr();

printf("Enter number : ");
scanf("%d", &no);

if(no==0)
printf("sum = 0");
else
{
no=no%9;
if(no==0)
printf("sum = 9");
else
printf("sum = %d", no);
}

getch();
}

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