C Program to Add of Two Numbers

The following program performs the arithmetic operation of adding two numbers and prints their sum on the screen. In this example, the user must input two numbers.

Declare the Variables:

The first step in adding two numbers using C programming is to declare the variables that will store the values of the two numbers. In C programming, we can declare variables using the syntax: 

data_type variable_name; 

For example, to declare two variables that will store the values of the two numbers, we can use the following code:

int num1, num2;

Get Input from User:

After declaring the variables, we need to get the input from the user. To do this, we can use the scanf() function. The scanf() function reads the input from the user and stores it in the variables. Here is the code to get the input from the user:

printf("Enter the first number: ");

scanf("%d", &num1);

printf("Enter the second number: ");

scanf("%d", &num2);

Add the Numbers: 

Now that we have the two numbers, we can add them together using the + operator. The result of the addition can be stored in another variable. Here is the code to add the two numbers:

int sum = num1 + num2;

Display the Result:

Finally, we can display the result of the addition using the printf() function. Here is the code to display the result:

printf("The sum of %d and %d is %d", num1, num2, sum);

Program:

/*To add two numbers*/
#include<math.h>
#include<stdio.h>
int main ()
{
/*Two numbers , which are to be added , are taken as a and b*/
int a=0, b=0, sum=0;
printf("Enter a:");
scanf("%d", &a);
printf("Enter b:");
scanf("%d", &b);
sum=a+b;
printf("\n The sum is: %d\n",sum);
return(0);
}

Output:

Summary:

Similarly, we can write a program that performs subtraction, multiplication, and division of two numbers.

Conclusion: Adding two numbers using C programming is a basic but essential operation in programming. In this tutorial, we learned how to declare variables, get input from the user, add the two numbers, and display the result using C programming. By understanding these basic concepts, you can start building more complex programs in the future.