C++ program to add two numbers

C++ program to add two numbers:

In this post, I will show you how to add two numbers in a C++ program. This is a beginner level question and you will learn how we can read user inputs and how we can do arithmatic calculations in C++.

Our program will take two numbers as inputs from the user, adds them and print out the result on console.

so the program will:

Ask the user to enter the first number. Read and store it in a variable.
Ask the user to enter the second number. Read and store it in another variable.
Add both numbers that user has entered. Store this result in another variable.
Print the value in the result variable.

C++ program:

Below is the complete C++ program :

#include<iostream>
using namespace std;

int main(){
  int first, second, sum;

  cout<<"Enter the first number : "<<endl;
  cin >> first;

  cout<<"Enter the second number : "<<endl;
  cin>> second;

  sum = first + second;

  cout<<"Sum : "<<sum<<endl;
}

Explanation:

Here,

first, second and sum are three integer variables to store the first number, second number and sum of these numbers.
Using cout, we are asking the user to enter the first number. Using cin, we are reading that number and storing that value in first.
Similarly, we are reading and storing the second number in second.
Both numbers are added using + and the sum is stored in sum.
The last line prints the sum variable on console using cout.

Sample output:

Enter the first number :
10
Enter the second number :
12
Sum : 22

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