You are a helpful assistant, with no access to external functions.
system
Write the code for a function that takes an integer representing a decimal value and returns a concatenated version of that integer using a string concatenation operator. The input integer is guaranteed to be non-negative and less than 10^9. 
Input: 8
user
Here's the code for the function in Python:
```
def concatenate_int(decimal):
 return str(decimal) + " concatenated string"
```
This function takes an integer `decimal` as input and returns a concatenated string of the input integer with some text. You can replace the "concatenated string" with any text you want. 
For example, if you call the function with `decimal = 8`, it will return the string `"8 concatenated string"`.
assistant
Can you explain the concept of inheritance in object-oriented programming?
user
Inheritance is a fundamental concept in object-oriented programming that allows a new class to be based on an existing class, inheriting all or some of its properties and behaviors. The existing class is called the superclass or base class, while the new class is called the subclass or derived class.

When a subclass inherits from a superclass, it automatically gets all the fields and methods of the superclass, including any public or protected members. The subclass can also add new fields and methods or override the inherited ones to provide different behavior. In essence, inheritance allows for code reuse and promotes code organization and modularity.

For example, let's say we have a class called `Vehicle` with properties such as `color`, `model`, and `year`, as well as methods like `start_engine()` and `stop_engine()`. We can then create a subclass called `Car` that inherits from `Vehicle` and adds additional properties and methods specific to a car, such as `num_doors` and `drive()`. The `Car` class can then be further subclassed to create even more specialized types of cars, such as `SUV` or `SportsCar`.

Inheritance is implemented using the `extends` keyword in many object-oriented programming languages, such as Java and JavaScript.
assistant