- C Programming Examples
- C Programming Examples
- C Print Hello World
- C Get Input from User
- C Print Integer
- C Add Two Numbers
- C Add Subtract Multiply Divide
- C Add n Numbers
- C Area Perimeter of Square
- C Area Perimeter of Rectangle
- C Area Circum of Circle
- C Fahrenheit to Celsius
- C Celsius to Fahrenheit
- C Inches to Centimeters
- C Kilogram to Gram
- C Reverse a Number
- C Swap Two Numbers
- C Interchange Numbers
- C Print ASCII Value
- C Print Fibonacci Series
- C Check Palindrome or Not
- C Check Armstrong or Not
- C Find Armstrong Numbers
- C Find nCr and nPr
- C Find Profit Loss
- C Sum of their Square
- C First & Last Digit Sum
- C Sum of All Digit
- C Product of All Digit
- C Print Total Digit in Number
- C Check Perfect Number
- C Find Basic Gross Salary
- C Round Number to Integer
- C Print Series upto n Term
- C Find Factors of Number
- C if-else & Loop Programs
- C Check Even or Odd
- C Check Prime or Not
- C Check Alphabet or Not
- C Check Vowel or Not
- C Check Leap Year or Not
- C Is Reverse Equal Original
- C Make Calculator
- C Add Digits of Number
- Count Positive Negative Zero
- C Largest of Two Numbers
- C Largest of Three Numbers
- C Smallest of Two Numbers
- C Smallest of Three Numbers
- C Find Factorial of Number
- C Find LCM & HCF
- C Find LCM of n Numbers
- C Find HCF of n Numbers
- C Find Arithmetic Mean
- C Find Average, Percentage
- C Find Student Grade
- C Print Table of Number
- C Print Prime Numbers
- C Find Discount Purchase
- C Calculate Parcel Charge
- C Calculate Wage of Labor
- C Print Phone Bill
- C Conversion programs
- C Decimal to Binary
- C Decimal to Octal
- C Decimal to Hexadecimal
- C Binary to Decimal
- C Binary to Octal
- C Binary to Hexadecimal
- C Octal to Decimal
- C Octal to Binary
- C Octal to Hexadecimal
- C Hexadecimal to Decimal
- C Hexadecimal to Binary
- C Hexadecimal to Octal
- C Pattern Programs
- C Pattern Printing Programs
- C Print Diamond Pattern
- C Print Floyd's Triangle
- C Print Pascal's Triangle
- C Array Programs
- C 1D Array Programs
- C Linear Search
- C Binary Search
- C Largest Element in Array
- C Smallest Element in Array
- C Second Largest/Smallest
- C Count Even Odd
- C Array Element at Even
- C Array Element at Odd
- C Print Even Array Elements
- C Print Odd Array Elements
- C Sum/Product of Even/Odd
- C Reverse an Array
- C Insert Element in Array
- C Delete Element from Array
- C Merge Two Arrays
- C Bubble Sort
- C Selection Sort
- C Insertion Sort
- C Print Common Elements
- C 2D Array Programs
- C Add Two Matrices
- C Subtract Two Matrices
- C Transpose a Matrix
- C Multiply Two Matrices
- C Sum All Matrix Elements
- C Largest Element in Matrix
- C Print Row Column Total
- C 3D Array Programs
- C String Programs
- C Print String
- C Find Length of String
- C Compare Two String
- C Copy a String
- C Concatenate String
- C Reverse a String
- C Count Vowels Consonants
- C Replace Vowel in String
- C Delete Vowels from String
- C Delete Word from String
- C Frequency of Character
- C Count Word in String
- C Remove Spaces from String
- C Sort a String
- C Sort String in Alphabetical
- C Sort Words in Ascending
- C Sort Words in Descending
- C Uppercase to Lowercase
- C Lowercase to Uppercase
- C Swap Two Strings
- C Check Anagram or Not
- C Check Palindrome String
- C Print Number in Words
- C Print Successive Character
- C Character without Space
- C Remove Extra Spaces
- C File Programs
- C Read a File
- C Write Content to File
- C Read & Display File
- C Copy a File
- C Merge Two Files
- C Reverse File
- C Count All Character in File
- C List Files in Directory
- C Encrypt & Decrypt a File
- C Delete a File
- C Misc Programs
- Generate Random Numbers
- C Print Date Time
- C Print Message with Time
- C Get IP Address
- C Print Smiling face
- C Pass Array to Function
- Add Two Numbers using Pointer
- C Address of Variable
- C Shutdown Computer
- C Programming Tutorial
- C Tutorial
- C Programming Library
- C Standard Library
- C Programming Test
- C Programming Test
- Give Online Test
- All Test List
C Program to Add Two Numbers
In this article, you will learn and get code about how to add two numbers in C. Here are the list of ways that is used here in this article to add two numbers in C:
- Add two Numbers of Integer Type
- Add two Numbers of Floating-point Type
- Add two Numbers using Function
- Add two Numbers using Recursion
Add two Numbers in C
First, we will learn about adding two numbers of Integer type. To add two numbers in C programming, ask from user to enter any two numbers. Place the addition of entered two number in a third variable of same data type. Finally print the value of third variable.
#include<stdio.h> #include<conio.h> int main() { int num1, num2, add; printf("Enter any two number: "); scanf("%d%d", &num1, &num2); add = num1+num2; printf("\nSum of %d and %d is %d", num1, num2, add); getch(); return 0; }
As the above program was written under Code::Blocks IDE, therefore here is the initial snapshot of sample run:
Now supply any two number say 10 and 20, then press ENTER key to see the output as shown in the second snapshot of same sample run:
Steps used in above Program
Here are some of the main steps involved in above program:
- Declare any three variables say num1, num2 and add
- Here num1 and num2 holds first and second number entered by user, add will be used to store the addition result of given two number
- Now scan any two number entered by user
- Initialize the addition of num1 and num2 to add
- Print the value of add as output
Add Two Real Numbers in C
The above program is only applicable for integer value. If user supply any two number that contains decimal, then above program will not applicable in that case. So here is the modified version of adding two numbers in C without matter of whether entered number is an integer value or a real number.
#include<stdio.h> #include<conio.h> int main() { float num1, num2, add; printf("Enter any two number: "); scanf("%f%f", &num1, &num2); add = num1+num2; printf("\nSum of %0.2f and %0.2f is %0.2f", num1, num2, add); getch(); return 0; }
The snapshot given here shows the sample run of above program:
As you can see from above program, in place of int, declare all the three variables of float type. To learn more about data type, refer to Data Types in C tutorial.
Here %0.2f is used to print real number upto 2 decimal place only.
Add two Numbers in C using Function
Now let's create another program that does the same job but this time using function. Let's take a look at the program:
#include<stdio.h> #include<conio.h> int sum(int, int); int main() { int num1, num2, add; printf("Enter any two number: "); scanf("%d%d", &num1, &num2); add = sum(num1, num2); printf("\nSum = %d", add); getch(); return 0; } int sum(int a, int b) { return a+b; }
Here is the sample run:
To learn more about function in c, refer to Function in C tutorial article.
Add two Numbers in C using Recursion
The question is write a program in C to add two numbers using recursive function. Let's take a look at the program first:
#include<stdio.h> #include<conio.h> int sum(int, int); int main() { int num1, num2, add; printf("Enter any two number: "); scanf("%d%d", &num1, &num2); add = sum(num1, num2); printf("\nSum = %d", add); getch(); return 0; } int sum(int a, int b) { if(b==0) return a; else return (1+sum(a, b-1)); }
Here is the snapshot of sample run of above program:
To learn about recursion in detail, refer to Recursion in C tutorial.
Same Program in Other Languages
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