In this post, we will learn **how to calculate the area of a square using C++** Programming language.

**Area of a square** is calculated using the formula: **Area = Side x Side**.

We will calculate the area of a square using the following approaches:

- Using Standard Method
- Using Function

So, without any delay, let’s begin this tutorial.

**C++ Program to Calculate Area of Square**

// C++ Program to Calculate Area of Square #include <iostream> using namespace std; int main(){ int side, area; // Asking for input cout << "Enter the side of square: "; cin >> side; // Calculating area area = side * side; // Displaying output cout << "Area of square of side " << side << " is: " << area; return 0; }

**Output**

```
Enter the side of square: 7
Area of square of side 7 is: 49
```

**How Does This Program Work ?**

int side, area;

In this program, we have declared **two integer data type** variables named **side** and **area**.

// Asking for input cout << "Enter the side of square: "; cin >> side;

The user is asked to enter the length of the side. This value gets stored in the **side** named variable.

// Calculating area area = side * side;

Area is calculated by using the formula, **area = side x side**. The result gets stored in the **area** named variable.

// Displaying output cout << "Area of square of side " << side << " is: " << area;

The area of the square is displayed on the screen using the **cout** statement.

**C++ Program to Calculate Area of Square Using Function**

// C++ Program to Calculate Area of Square Using Function #include <iostream> using namespace std; int areaSquare(int x){ return x * x; } int main(){ int side, area; // Asking for input cout << "Enter the side of square: "; cin >> side; // Calling out function area = areaSquare(side); // Displaying output cout << "Area of the square is: " << area; return 0; }

**Output**

```
Enter the side of square: 12
Area of the square is: 144
```

**Conclusion**

I hope after going through this post, you understand **how to calculate the area of a square using C++** Programming language.

If you have any doubt regarding the program, feel free to contact us in the comment section. We will be delighted to assist you.

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