Answers for "how to add numbers in c++"

add two numbers in c++

#include <iostream>
using namespace std;

//function declaration
int addition(int a,int b);

int main()
{
	int a,b;	//to store numbers
	int add;	//to store addition 
	
	//read numbers
	cout<<"Enter first number: ";
	cin>>a;
	cout<<"Enter second number: ";
	cin>>b;
	
	//call function
	add=addition(a,b);
	
	//print addition
	cout<<"Addition is: "<<add<<endl;
	
	return 0;
}

//function definition
int addition(int a,int b)
{
	return (a+b);
}

how to add numbers in for loop c++

#include <iostream>

int main() {
  int n = 0;
  int sum = 0;
  std::cout << "Please enter and integer: ";
  std::cin >> n;

  //this will ensure that the integer is posetive.
  while (n < 0 ) {
    std::cout <<"Please enter positive integer only.n";
    std::cout << "Please enter and integer: ";
    std::cin >> n;
  }

  for (int i = 0; i < n ; i++) {
    std::cout << i << "n";
    sum +=i
  }
  std::cout << "Sum of odd numbers is " << sum <<".n";

}