Calculating the volume of a cube is a basic problem often encountered in geometry. A cube is a three-dimensional shape with six equal square faces. The formula to calculate the volume of a cube is:

V = a^3

where V is the volume and ais the length of a side of the cube.

In this article, we will write a C++ program that takes the side length of a cube as input and calculates its volume using the formula provided.

### Prerequisites

Before we begin, ensure you are familiar with:

- Basic input and output operations in C++
- Arithmetic operations in C++
- Compiling and running a C++ program

## C++ Program to Calculate the Volume of a Cube

C++

```
#include <iostream>
using namespace std;
int main() {
// Variable to store the side length of the cube
double side;
// Prompt the user to enter the side length of the cube
cout << "Enter the side length of the cube: ";
cin >> side;
// Calculate the volume of the cube
double volume = side * side * side;
// Display the volume of the cube
cout << "The volume of the cube is: " << volume << " cubic units" << endl;
return 0;
}
```

### Output

#### Example 1

C++

```
Enter the side length of the cube: 3
The volume of the cube is: 27 cubic units
```

#### Example 2

C++

```
Enter the side length of the cube: 5
The volume of the cube is: 125 cubic units
```

**Explanation:**

**Variable Declaration:**`side`

is declared to store the input side length of the cube.`volume`

is declared to store the calculated volume of the cube.

**Input Handling:**- The program prompts the user to enter the side length of the cube.
- The input is read and stored in the
`side`

variable.

**Volume Calculation:**- The formula to calculate the volume of a cube is applied: V=a3V = a^3V=a3.
- This is implemented as
`volume = side * side * side`

. - The result is stored in the
`volume`

variable.

**Output:**- The program displays the volume of the cube.

## Conclusion

Calculating the volume of a cube is a simple and fundamental problem in geometry. This C++ program demonstrates how to perform the calculation using basic arithmetic operations and handle user input/output.