FIND OUT GENERIC ROOT OF A NUMBER USING C PROGRAM





void main()
{
    long int num,sum,r;
    clrscr();
    printf("\nEnter a number:-");
    scanf("%ld",&num);
    while(num>10)
    {
         sum=0;
         while(num)
         {
             r=num%10;
             num=num/10;
             sum+=r;
         }
         if(sum>10)
             num=sum;
         else
             break;
    }
    printf("\nSum of the digits in single digit is: %ld",sum);
    getch();
}
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