Sum and Difference of Two Numbers HackerRank Solution

Problem Statement

The fundamental data types in c are int, float and char. Today, we’re discussing int and float data types.

The printf() function prints the given statement to the console. The syntax is printf(“format string”,argument_list);. In the function, if we are using an integer, character, string or float as argument, then in the format string we have to write %d (integer), %c (character), %s (string), %f (float) respectively.

The scanf() function reads the input data from the console. The syntax is scanf(“format string”,argument_list);. For ex: The scanf(“%d”,&number) statement reads integer number from the console and stores the given value in variable number.

To input two integers separated by a space on a single line, the command is scanf(“%d %d”, &n, &m), where n and m are the two integers.

Function Description

Complete the main() function below.

The main() function has the following input:

  • string s: a string


Your task is to take two numbers of int data type, two numbers of float data type as input and output their sum:

  1. Declare  variables: two of type int and two of type float.
  2. Read  lines of input from stdin (according to the sequence given in the ‘Input Format’ section below) and initialize your  variables.
  3. Use the  and  operator to perform the following operations:
  • Print the sum and difference of two int variable on a new line.
  • Print the sum and difference of two float variable rounded to one decimal place on a new line.

Input Format

  • The first line contains two integers.
  • The second line contains two floating point numbers.


  • 1 <= integer variables <= 10^4
  • 1 <= float variables <= 10^4

Print the sum and difference of both integers separated by a space on the first line, and the sum and difference of both float (scaled to 1 decimal place) separated by a space on the second line.

Example 1:

10 4
4.0 2.0


14 6
6.0 2.0


When we sum the integers 10 and 4, we get the integer 14. When we subtract the second number 4 from the first number 10, we get 6 as their difference.
When we sum the floating-point numbers 4.0 and 2.0, we get 6.0. When we subtract the second number 2.0 from the first number 4.0, we get 2.0 as their difference.

Sum and Difference of Two Numbers HackerRank Solution

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

int main()
    int a,b;
    float c,d;
    scanf("%d %d",&a,&b);
    scanf("%f %f",&c ,&d);
    int int_sum = a+b;
    int int_diff = a-b;
    float float_sum = c+d;
    float float_diff = c-d;
    printf("%d %d\n",int_sum,int_diff);
    printf("%0.1f %0.1f", float_sum,float_diff);
    return 0;


  1. Include Standard Libraries: The program starts by including standard C libraries such as stdio.h for input/output operations, string.h for string handling functions (though it’s not used in this program), math.h for mathematical operations (also not used here), and stdlib.h for general utility functions.
  2. Declare Variables: It declares four variables: two integers (a and b) and two floating-point numbers (c and d). These variables are used to store the input values and perform arithmetic operations.
  3. Read Input Values: The program uses scanf function twice to read input from the user. The first scanf reads two integer values and stores them in a and b. The second scanf reads two floating-point values and stores them in c and d.
  4. Perform Arithmetic Operations:
  • For integers, it calculates the sum (int_sum = a + b) and the difference (int_diff = a - b).
  • For floating-point numbers, it calculates the sum (float_sum = c + d) and the difference (float_diff = c - d).

Read Also

Dynamic Array in c Hackerrank Solution

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