C program to add two numbers

Write a C program to input two numbers from user and calculate their sum. C program to add two numbers and display their sum as output. How to add two numbers in C programming.

Example
Input

Input first number: 20
Input second number: 10

Output

Sum = 30

Required knowledge

Arithmetic operators, Data types, Basic Input/Output

Program to add two numbers

/**
 * C program to find sum of two numbers
 */

#include <stdio.h>

int main()
{
    int num1, num2, sum;
    
    /*
     * Read two numbers from user
     */
    printf("Enter first number: ");
    scanf("%d", &num1);
    printf("Enter second number:");
    scanf("%d", &num2);
    
    /* Adding both number is simple and fundamental */
    sum = num1 + num2;
    
    /* Prints the sum of two numbers */
    printf("Sum of %d and %d = %d", num1, num2, sum);
    
    return 0;
}

Note: You can also write the above program using single scanf() function.

/**
 * C program to find sum of two numbers
 */

#include <stdio.h>

int main()
{
    int num1, num2, sum;
    
    /*
     * Input two numbers from user
     */
    printf("Enter any two numbers : ");
    scanf("%d%d", &num1, &num2);
    
    sum = num1 + num2;
    
    /* Prints the sum of two numbers */
    printf("Sum of %d and %d = %d\n", num1, num2, sum);
    
    return 0;
}

Note: \n is a escape sequence character used to print new line (used to move to the next line).

For advanced learning - Program to find sum of two numbers using pointers.

Output

Enter any two numbers : 12
20
Sum of 12 and 20 = 32

Happy coding 😉

About Pankaj

Pankaj Prakash is the founder, editor and blogger at Codeforwin. He loves to learn new techs and write programming articles especially for beginners. He works at Vasudhaika Software Sols as a Software Design Engineer and manages Codeforwin. In short Pankaj is Web developer, Blogger, Learner, Tech and Music lover.

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