Member Functions are the other name used for functions inside a class.

Explanation:
- In object-oriented programming, a class is a blueprint for creating objects (instances of the class).
- A class can consist of both data members and member functions.
- Member functions are the functions defined inside a class that operate on the data members of the class.
- These functions are also known as methods.
- Member functions have access to all the data members and other member functions of the class.
- They can be used to perform various operations on the data members, manipulate the data, and provide the desired functionality.
- Member functions can be defined within the class definition or outside the class definition.
- When a member function is defined inside the class definition, it is implicitly inline.
- Member functions can be declared in the public, private, or protected section of the class.
- The public member functions can be accessed by objects of the class and external functions, whereas private member functions can only be accessed by other member functions of the class.
- Member functions are called using the object of the class.
- They can be invoked by using the dot operator (.) followed by the function name and parentheses.

Example:
```cpp
class Rectangle {
private:
int length;
int width;

public:
// Member function to calculate area
int calculateArea() {
return length * width;
}

// Member function to set length and width
void setDimensions(int l, int w) {
length = l;
width = w;
}
};

int main() {
// Create an object of the class
Rectangle rect;

// Set the dimensions
rect.setDimensions(5, 3);

// Calculate and print the area
int area = rect.calculateArea();
cout < "area:="" "="" />< area="" />< />

return 0;
}
```

In the above example, we have a class named Rectangle with two member variables (length and width) and two member functions (calculateArea and setDimensions). The member function calculateArea calculates the area of the rectangle based on the length and width, and the member function setDimensions sets the values of length and width. These member functions can be accessed using the object of the class (rect).