Question

3. Write a complete C++ program that finds and prints the sum of values from 1 to N where N is a positive value > 10 entered by the user. If the user inputs a value less the 10 ask him to re-enter the value again and again until the value is valid. (20 Points)

Answer 1

SOLUTION =>

#include <iostream>
using namespace std;

int main() {
   cout<<"Enter N"<<endl;
   int N;
   cin>>N;
   while(N<10)
   {
   cout<<"re-enter the value of N"<<endl;
   cin>>N;
   }
   int sum = (N*(N+1))/2;
   cout<<"sum is : "<<sum<<endl;
   return 0;
}