C Program to Add Two Numbers

Introduction

Adding two numbers is one of the basic programs beginners learn when starting with C programming. In this article, we'll explain how to write and understand a C program that adds two numbers.

C Program to Add Two Numbers

#include <stdio.h>

int main() {
    int num1, num2, sum;

    // Input two integers
    printf("Enter two integers: ");
    scanf("%d %d", &num1, &num2);

    // Calculate the sum
    sum = num1 + num2;

    // Display the result
    printf("The sum of %d and %d is %d\n", num1, num2, sum);

    return 0;
}

Program Explanation

1. Header File Inclusion: #include <stdio.h> allows the use of standard input/output functions like printf() and scanf().

2. Main Function: The program execution begins with int main().

3. Variable Declaration: int num1, num2, sum; declares three integer variables.

4. Input from the User:

l printf() displays a message prompting the user to enter two integers

l scanf() reads these integers from user input.

5. Calculation: The sum of num1 and num2 is calculated and stored in sum.

6. Output the Result: printf() displays the result.

Sample Output

Enter two integers: 5 7

The sum of 5 and 7 is 12

Conclusion

This simple program demonstrates the basic structure of a C program, including input/output handling and arithmetic operations.