# Day 1: Data Types | 30 Days Of Code | HackerRank Solution

Hello coders, today we are going to solve Day 1: Data Type HackerRank Solution in C++, Java and Python which is the part of 30 Days Of Code Series.

Contents

## Objective

Today, we’re discussing data types.

Complete the code in the editor below. The variables id, and s are already declared and initialized for you. You must:

1. Declare 3 variables: one of type int, one of type double, and one of type String.
2. Read 3 lines of input from stdin (according to the sequence given in the Input Format section below) and initialize your  variables.
3. Use the + operator to perform the following operations:
1. Print the sum of i plus your int variable on a new line.
2. Print the sum of d plus your double variable to a scale of one decimal place on a new line.
3. Concatenate s with the string you read as input and print the result on a new line.

Note: If you are using a language that doesn’t support using + for string concatenation (e.g.: C), you can just print one variable immediately following the other on the same line. The string provided in your editor must be printed first, immediately followed by the string you read as input.

## Input Format

The first line contains an integer that you must sum with i.
The second line contains a double that you must sum with d.
The third line contains a string that you must concatenate with s.

## Output Format

Print the sum of both integers on the first line, the sum of both doubles (scaled to 1 decimal place) on the second line, and then the two concatenated strings on the third line.

Sample Input

``````12
4.0
is the best place to learn and practice coding!``````

Sample Output

``````16
8.0
HackerRank is the best place to learn and practice coding!``````

Explanation

When we sum the integers 4 and 12, we get the integer 16.
When we sum the floating-point numbers 4.0 and 4.0, we get 8.0.

## Solution – Day 1: Data Type Solution

### C

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

int main() {
int i = 4;
double d = 4.0;
char s[] = "HackerRank ";

int i2;
double d2;
char s2; // this is not scalable for input of unknown size

scanf("%d", &i2);
scanf("%lf", &d2);
scanf("%*[\n] %[^\n]", s2);

// Print outputs to stdout
printf("%d\n", i + i2);
printf("%.01lf\n", d + d2);
printf("%s%s", s, s2);

return 0;
}```

### C++

```#include <iostream>
#include <iomanip>
#include <limits>

using namespace std;

int main() {
int i = 4;
double d = 4.0;
string s = "HackerRank ";

// Declare second integer, double, and String variables.
int i2;
double d2;
string s2;
// Read and save an integer, double, and String to your variables.
// Note: If you have trouble reading the entire string, please go back and review the Tutorial closely.
cin >> i2;
cin >> d2;
cin.get();
getline(cin, s2);
// Print the sum of both integer variables on a new line.
cout << i+i2 << endl;
// Print the sum of the double variables on a new line.
cout<< std::fixed <<std::setprecision(1)<< d + d2 << endl;
// Concatenate and print the String variables on a new line
cout << s << s2;
// The 's' variable above should be printed first.
return 0;
}```

### Java

```import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

public static void main(String[] args) {
int i = 4;
double d = 4.0;
String s = "HackerRank ";

Scanner scan = new Scanner(System.in);

/* Declare second integer, double, and String variables. */
int i2;
double d2;
String s2;

/* Read and save an integer, double, and String to your variables.*/
i2 = scan.nextInt();
d2 = scan.nextDouble();

scan.nextLine();
s2 = scan.nextLine();

/* Print the sum of both integer variables on a new line. */
System.out.println(i + i2);

/* Print the sum of the double variables on a new line. */
System.out.println(d + d2);

/* Concatenate and print the String variables on a new line;
the 's' variable above should be printed first. */
System.out.println(s.concat(s2));
scan.close();
}
}```

### Python

```i = 4
d = 4.0
s = 'HackerRank '
i2 = int(input())
d2 = float(input())
s2 = input()

print(i + i2)
print(d + d2)
print(s + s2)

```

### JavaScript

```process.stdin.resume();
process.stdin.setEncoding('ascii');

var input_stdin = "";
var input_stdin_array = "";
var input_currentline = 0;

process.stdin.on('data', function (data) {
input_stdin += data;
});

process.stdin.on('end', function () {
input_stdin_array = input_stdin.split("\n");
main();
});

// Reads complete line from STDIN
return input_stdin_array[input_currentline++];
}

function main() {
var i = 4
var d = 4.0
var s = "HackerRank "
// Declare second integer, double, and String variables.
// Read and save an integer, double, and String to your variables.

// Print the sum of both integer variables on a new line.
console.log(i + i2);

// Print the sum of the double variables on a new line.
console.log((d + d2).toFixed(1));

// Concatenate and print the String variables on a new line
// The 's' variable above should be printed first.
console.log(s + s2);

}```

Disclaimer: The above Problem (Day 1: Data Type) is generated by Hacker Rank but the Solution is Provided by CodingBroz. This tutorial is only for Educational and Learning Purpose.

### 2 thoughts on “Day 1: Data Types | 30 Days Of Code | HackerRank Solution”

1. Kindly give an explanation for every solutions because that is very useful to a new learner

2. Bruce Tushabe

Somehow , when i run the code, it throws this error:
Error: Unable to initialize main class Solution
Caused by: java.lang.NoClassDefFoundError: IOException . Can’t figure out why.