Sample C++ Program To Accept A Number ‘n’ & Find Sum Of All Numbers Upto 'n' - 15.

This program accepts a number from the user and finds the sum of all the numbers up to the number entered by the user.

SAMPLE PROGRAM:

#include <iostream.h>

#include <conio.h>

int recursion(int num);

int main()
{

int num = 0;
int sumnum;

cout << "Enter any integer greater than 0: " << endl;
cin >> num;

sumnum = recursion(num);
cout << "The sum is: " << sumnum << endl;

cin.ignore();
cin.get();

return 0;
}


int recursion(int num)
{

int sum = 0;

if(num == 1)
return 1;
else
  {
    sum = recursion(num - 1) + num;
    return sum;
  }

}


OUTPUT:

Enter any integer greater than 0: 6
The sum is: 21


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