In this HackerRank Day 0: Hello, World problem solution Complete the code in the editor. 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:
4. Print the sum of i plus your int variable on a new line.
5. Print the sum of d plus your double variable to a scale of one decimal place on a new line.
6. Concatenate s with the string you read as input and print the result on a new line.

## Problem solution in Python programming.

```# Declare second integer, double, and String variables.

# Read and save an integer, double, and String to your variables.
a = input()
b = input()
c = input()
# Print the sum of both integer variables on a new line.
print(int(a)+i)
# Print the sum of the double variables on a new line.
print(float(b) + d)
# Concatenate and print the String variables on a new line
# The 's' variable above should be printed first.
print(s+c)```

### Problem solution in Java programming.

```        /* Declare second integer, double, and String variables. */
int iIn = 0;
double dIn = 0.0;
String sIn;

/* Read and save an integer, double, and String to your variables.*/
iIn = scan.nextInt();
dIn = scan.nextDouble();
scan.nextLine();
sIn = scan.nextLine();

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

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

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

### Problem solution in C++ programming.

```
// Declare second integer, double, and String variables.
int myInt;
double myD;
string myS;

// Read and save an integer, double, and String to your variables.
cin >> myInt;
cin >> myD;
cin.ignore(numeric_limits<streamsize>::max(), '\n');
getline(cin, myS);

// Print the sum of both integer variables on a new line.
cout << i+myInt << endl;

// Print the sum of the double variables on a new line.
printf("%.1lf\n", d+myD);
// Concatenate and print the String variables on a new line
// The 's' variable above should be printed first.
cout << s << myS;
//printf("%s", myS);
```

### Problem solution in C programming.

```    // Declare second integer, double, and String variables.
int i2;
double d2;
char s2;
// Read and save an integer, double, and String to your variables.
scanf("%d\n",&i2);
scanf("%lf\n",&d2);
scanf("%[^\n]s",s2);
// Print the sum of both integer variables on a new line.
printf("%d\n",i+i2);
// Print the sum of the double variables on a new line.
printf("%1.1f\n",d+d2);
// Concatenate and print the String variables on a new line
printf("%s%s\n",s,s2);
// The 's' variable above should be printed first.
```

### Problem solution in JavaScript programming.

```    // Declare second integer, double, and String variables.
var myInt = parseInt(input_stdin_array);
var myDouble = parseFloat(input_stdin_array);
var myStr = input_stdin_array;

// 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 + myInt);
// Print the sum of the double variables on a new line.
var sum = d + myDouble;
console.log(sum.toFixed(1));
// Concatenate and print the String variables on a new line
// The 's' variable above should be printed first.
console.log(s.concat(myStr));```