An employee needs a program to enter the before-tax price of a product and calculate its final price. Assume a value added tax (VAT) of 19%.

###### Solution

The sales tax can be easily calculated. You must multiply the before-tax price of the product by the sales tax rate. Be careful—the sales tax is not the final price, but only the tax amount.

The after-tax price can be calculated by adding the initial before-tax price and the sales tax that you calculated beforehand.

In this program you can use a constant named `VAT` for the sales tax rate.

## PHP

```<?php
define("VAT", 0.19);

echo "Enter the before-tax price of a product: ";
\$price_before_tax = trim(fgets(STDIN));

\$sales_tax = \$price_before_tax * VAT;
\$price_after_tax = \$price_before_tax + \$sales_tax;

echo "The after-tax price is: ", \$price_after_tax;
?>

```

## Java

```static final double VAT = 0.19;

public static void main(String[] args) throws java.io.IOException {
double price_after_tax, price_before_tax, sales_tax;

System.out.print("Enter the before-tax price of a product: ");

sales_tax = price_before_tax * VAT;
price_after_tax = price_before_tax + sales_tax;

System.out.println("The after-tax price is: " + price_after_tax);
}
```

Notice: Please note that the constant` VAT` is declared outside of the method `main`.

## C++

```#include <iostream>
using namespace std;
const double VAT = 0.19;

int main() {
double price_after_tax, price_before_tax, sales_tax;

cout << "Enter the before-tax price of a product: ";
cin >> price_before_tax;

sales_tax = price_before_tax * VAT;
price_after_tax = price_before_tax + sales_tax;

cout << "The after-tax price is: " << price_after_tax;
return 0;
}

```

Notice: Please note that the constant` VAT` is declared outside of the function` main`.

## C#

```const double VAT = 0.19;

static void Main() {
double price_after_tax, price_before_tax, sales_tax;

Console.Write("Enter the before-tax price of a product: ");

sales_tax = price_before_tax * VAT;
price_after_tax = price_before_tax + sales_tax;

Console.Write("The after-tax price is: " + price_after_tax);
}

```

## Visual Basic

```Const VAT = 0.19

Sub Main()
Dim price_after_tax, price_before_tax, sales_tax As Double

Console.Write("Enter the before-tax price of a product: ")

sales_tax = price_before_tax * VAT
price_after_tax = price_before_tax + sales_tax

Console.Write("The after-tax price is: " & price_after_tax)

End Sub

```

Notice: Please note that the constant` VAT` is declared outside of the method `Main`.

## Python

```VAT = 0.19

price_before_tax = float(input("Enter the before-tax price of a product: "))

sales_tax = price_before_tax * VAT
price_after_tax = price_before_tax + sales_tax

print("The after-tax price is:", price_after_tax)
```