# C++ Program to Find Area of Rectangle Using Function

Howdy readers, today you will learn how to write a program to find the area of a triangle using function in C++ Programming language.

The below program prompts the user to enter the dimensions of the rectangle, then we define a user-defined function which calculates and returns the area of a rectangle.

Area of a rectangle is the product of its length and breadth. We will keep this fact in mind while writing the program.

So, without any delay, letâ€™s begin this tutorial.

## C++ Program to Find Area of Rectangle Using Function

C++ Program

```// C++ Program to Find Area of Rectangle Using Function
#include <iostream>
using namespace std;

int areaRect(int x, int y){
return x * y;
}

int main(){

// Taking input from the user
cout << "Enter the length: ";
cin >> length;
cout << "Enter the breadth: ";

// Calling out user-defined function

// Displaying result
cout << "Area of the rectangle is: " << area << endl;

return 0;
}
```

Output

```Enter the length: 5
Area of the rectangle is: 35
```

Explanation

```int areaRect(int x, int y){
return x * y;
}
```

In the above program, we have defined a user-defined function named `areaRect` which calculates the area of the rectangle when two arguments are passed. The two arguments should be the dimensions of the rectangle.

```    int length, breadth, area;
```

In the main function, we have declared three int data type variables named `length`, `breadth` and `area`.

```    // Taking input from the user
cout << "Enter the length: ";
cin >> length;
cout << "Enter the breadth: ";
```

This program prompts the user to enter the length and breadth of the rectangle.

```    // Calling out user-defined function
```

After that, the user-defined function is called in the main function. This gives us the area of the rectangle. This value gets stored in the `area` named variable.

```    // Displaying result
cout << "Area of the rectangle is: " << area << endl;
```

The area of the rectangle computed using a function is displayed on the screen using the cout statement.

## Conclusion

I hope after reading this post, you understand how to write a program to find the area of a rectangle using function in C++ Programming language.

If you have any queries regarding the program, then let us know in the comment section. We will be pleased to solve all of your queries.