C++ program to enter length and breadth of a rectangle and find its perimeter

In this article, you will learn how to find the perimeter of a rectangle in the c++ language.

You should have knowledge of the following topics in c++ programming.

• C++ main() function
• C++ cin object
• C++ cout object

Formula

This is the standard formula to calculate the perimeter of a rectangle.

P = 2(l + w)

Where

P = perimeter

l = length of the rectangle

w = width of the rectangle

Source Code

// C++ program to find the perimeter of a rectangle
#include <iostream>
using namespace std;

int main() {
    float l, w, p;

    cout << "Enter the length & width of the rectangle::\n";
    cin >> l;
    cin >> w;

    /* Calculate perimeter of rectangle */
    p = 2 * (l + w);

    /* Print output */
    cout << "\nThe Perimeter of rectangle = " << p << " units";
    return 0;
}

Run Program

Output

Explanation

In this program, we have taken two inputs from the user rectangle's width 5 and rectangle's height 7.

Then used the standard formula P = 2(l + w) to calculate the perimeter of a rectangle then it will return the 24 units the perimeter of the rectangle.