Question

sum of all positive integers , sum of negative integers in c++

Answer 1

To understand this example, you should have the knowledge of following C++ programming topics:

C++ for Loop

Positive integers 1, 2, 3, 4... are known as natural numbers.

This program takes a positive integer from user( suppose user entered n ) then, this program displays the value of 1+2+3+....+n.

Example: Sum of Natural Numbers using loop

#include <iostream> using namespace std; int main() { int n, sum = 0; cout << "Enter a positive integer: "; cin >> n; for (int i = 1; i <= n; ++i) { sum += i; } cout << "Sum = " << sum; return 0; }

Output

Enter a positive integer: 50 Sum = 1275