Answer Posted / revanth kumar.p

include<stdio.h>
#include<conio.h>
int main()
{
int num,len = 1,a,b;
printf("Enter a number");
scanf("%d",&num);
while(num >= 10)
{
num = num/10;
len++;
}
printf("%d",len);
a=len;
a=len*(len+1)%2;
printf("\n%d",a);
b=len;
b=len*(len+1)/2;
printf("\n%d",b);
a=a+b;
printf("\n%d",a);


getch();

}

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