Add Two Numbers

#include <stdio.h>

int main() 
{
    // Declare variables to store the two numbers and the sum
    int num1, num2, sum;

    // Ask the user for input
    printf("Enter the first number: ");
    scanf("%d", &num1);

    printf("Enter the second number: ");
    scanf("%d", &num2);

    // Calculate the sum of the two numbers
    sum = num1 + num2;

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

    return 0;
}

Explanation

return 0;: This line indicates that the program finished successfully, returning an exit status of 0.

#include <stdio.h>:

This line includes the standard input-output library, which allows us to use functions like printf and scanf for output and input, respectively.

int main():

This line defines the main function, where the execution of the program begins. The int indicates that this function will return an integer value.

Variable Declaration:

int num1, num2, sum;: Here, we declare three integer variables: num1 and num2 for storing the user inputs, and sum for storing the result of the addition.

Input from the User:

printf("Enter the first number: ");: This line prompts the user to enter the first number.

scanf("%d", &num1);: This line reads an integer input from the user and stores it in the variable num1. The & operator is used to get the address of the variable where the input will be stored.

The same two lines are repeated for the second number (num2).

Calculating the Sum:

sum = num1 + num2;: This line adds the two numbers stored in num1 and num2, and stores the result in the variable sum.

Displaying the Result:

printf("The sum of %d and %d is %d\n", num1, num2, sum);: This line prints the result to the console. The %d placeholders are used to insert the integer values of num1, num2, and sum into the string.

Return Statement:

OUTPUT

Enter the first number: 5
Enter the second number: 7
The sum of 5 and 7 is 12