C++/Basic Programs/Program

Add Two Numbers

Beginner-friendly C++ program that reads two numbers from the user, adds them, and displays the result.

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#include <iostream>
using namespace std;

int main() {
    int num1, num2;
    
    cout << "Enter first number: ";
    cin >> num1;
    
    cout << "Enter second number: ";
    cin >> num2;
    
    int sum = num1 + num2;
    
    cout << "Sum of " << num1 << " and " << num2 << " = " << sum << endl;
    
    return 0;
}

Output

Enter first number: 15
Enter second number: 27
Sum of 15 and 27 = 42

Add Two Numbers in C++

This program teaches the most basic arithmetic operation in C++ — adding two numbers. It takes two integer values from the user, performs the addition using the + operator, and prints the result. This program is perfect for beginners because it introduces user input, arithmetic operators, variables, and output formatting.

Program Flow

  1. Read two numbers from user
  2. Add them using the + operator
  3. Display the result

Key Concepts

  • Variables: Store the input numbers

  • Input: Using cin to read user input

  • Arithmetic: Using + operator for addition

  • Output: Using cout to display results

Example

If user enters:

  • First number: 15
  • Second number: 27

Then:

  • Sum = 15 + 27 = 42

Summary

  • The program reads two numbers.
  • It adds them using the + operator.
  • It prints the result.
  • This is the simplest and most essential arithmetic program for beginners learning C++.

Once students master this, they can easily understand subtraction, multiplication, division, and more advanced programs.

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