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Area of a Rectangle If we know the width and height of a rectangle, we can calculate the area of a rectangle using the formula: We can calculate perimeter of a rectangle using the formula: Using those values we will calculate the Area of a rectangle and perimeter of a rectangle.
You can remove the second System.
In this example, we are going to use the logic that we specified in first example but we will separated the logic and place it in a method. To do this, First we will create a class which holds a methods. RectangleArea width, height ; System. First we declared a function AreaofRectangle with two arguments.
Within the function, we are calculating the Area and Perimeter of Rectangle using respective mathematical formulas. Within the function, we used the System. Next we declared a RectangleArea function with two arguments of type double.
Within the function, calculating the Area of Rectangle and we are returning the Value. If you want to return any value then replace void with data type and add return keyword.
Note, this is the first method that we created with void keyword and this method will calculate Area and Perimeter and print the output from the AreaOfARectangle Class itself.
AreaofRectangle width, height ; Next, we are calling the RectangleArea method. This is the second method that we created with double data type and this method will calculate Area and return a value so, we are assigning the return value to Area variable.
In this article we will show you, How to write Java Program to find Area Of Rectangle and Perimeter of Rectangle with example. Before we step into the Java program, Let see the definitions and formulas behind Perimeter and Area Of Rectangle.
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