Chapter 6, Problem 6.1P

To determine

To write:

A function perimarea that calculates and returns the perimeter, area of rectangle and pass the length and width of the rectangle as input arguments.

Answer to Problem 6.1P

Solution:

The function file is,

% MATLAB code to calculates and returns the perimeter and area of a rectangle.

%Function file.

function [perimeter, Area] = perimarea(len, Wid)

%put the input arguments as length and width and get the perimeter and area

%by using the function perimarea.

perimeter = 2*(len+Wid);

%define the variable perimeter.

Area = len*Wid;

%define the variable area.

end

% end of function

%The script file should be placed in the same folder.

Explanation of Solution

The formula for the area of the rectangle is given as,

$\text{Area}=l\times b$

Here, the length of the rectangle is $l$ and width is $b$.

Substitute 10 for $l$ and 5 for $b$ in the above formula.

$\begin{array}{rll}\text{Area}& =& 10\times 5\\ & =& 50\end{array}$

The formula for the perimeter of the rectangle is given as,

$\text{perimeter}=2\left(l+b\right)$

Substitute 10 for $l$ and 5 for $b$ in the above formula.

$\begin{array}{rll}\text{perimeter}& =& 2\left(10+5\right)\\ & =& 30\end{array}$

MATLAB Code:

clc

clear all

close all

% MATLAB code to calculates and returns the perimeter and area of a rectangle.

%Function file.

function [perimeter, Area] = perimarea(len, Wid)

%put the input arguments as length and width and get the perimeter and area

%by using the function perimarea.

perimeter = 2*(len+Wid);

%define the variable perimeter.

Area = len*Wid;

%define the variable area.

end

% end of function

%The script file should be placed in the same folder.

Save the MATLAB script with name, perimarea.m in the current folder. Execute the function by typing the function name at the command window to generate output.

Result:

The result is,

Therefore, the result is stated above.