# Day 1: Data Types(HackerRank – 30 Days of Code)

Complete the code in the editor below. The variables i,d, 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 3 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.

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.

Solution:

1.Javascript:

``````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.
console.log(i+parseInt(myint));
// Print the sum of both integer variables on a new line.
console.log((d+parseFloat(myDouble)).toFixed(1));
// Print the sum of the double variables on a new line.
console.log(s+myString);
// Concatenate and print the String variables on a new line
// The 's' variable above should be printed first.

}``````

2.Java:

``````        /* Declare second integer, double, and String variables. */
int integer;
double mydouble;
String myString;
/* 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.
integer=scan.nextInt();
mydouble=scan.nextDouble();
scan.nextLine();
myString=scan.nextLine();
/* Print the sum of both integer variables on a new line. */
System.out.println(i+integer);
/* Print the sum of the double variables on a new line. */
System.out.println(d+mydouble);
/* Concatenate and print the String variables on a new line;
the 's' variable above should be printed first. */
System.out.println(s.concat(myString));
scan.close();``````