cpp-programming/OOP1-Lab7/sum.cpp at main · Exzqqq/cpp-programming · GitHub

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#include<iostream>

using namespace std;

long long int sum(long long int n) {//fuction called 'sum' foe calculating the sum of the natural numbers

if (n == 0)

return 0;//will return '0' when number will come to 0

else

return n + sum(n - 1);//using recursion

}

int main2() {

cout << "\t\t\t***Program to calculate the sum of natural numbers using recursion***" << endl;

int num;

cout << "Please enter the interval: ";

cin >> num;//inpuing the interval of the numbers

cout<<"The sum is : "<<sum(num);//calling function 'sum'

return 0;

}

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