Area and Perimeter: Write a program that prints the area and perimeter of a circle with a radius of 5.5 using the formula: Perimeter = 2 * radius * PI Area = radius * radius * PI Use Math.PI for PI in your program.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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Area and Perimeter: Write a program that prints the area and perimeter of a circle with a
radius of 5.5 using the formula:
Perimeter = 2 * radius * PI
Area
radius * radius * PI
Use Math.PI for PI in your program.
Transcribed Image Text:Area and Perimeter: Write a program that prints the area and perimeter of a circle with a radius of 5.5 using the formula: Perimeter = 2 * radius * PI Area radius * radius * PI Use Math.PI for PI in your program.
Expert Solution
Step 1

Solution:

Approach:

  • Create a class circle
  • In the main method declare the variables radius, area, perimeter of type double and initialize the radius =5.5
  • There are 2 ways to use Math.PI in the code:
  • Method 1:we can use as  :

double area = Math.PI*radius*radius; //calculating area using Math.PI
double perimeter = 2*radius*Math.PI;  // calculating perimeter using Math.PI

  • Method 2 we can use by importing package as  import static java.lang.Math.PI;  and in the code we can write as :

double area = PI*radius*radius; //calculating area 
 double perimeter = 2*radius*PI;  // calculating perimeter

  • Finally printing the values i have rounded the values to 3 decimal places since the value was very big as:

 System.out.format("%.3f",area); //printing area value that rounds to 3 decimal places
 System.out.format("%.3f",perimeter); // printing perimeter value that rounds to 3 decimal places

 

 

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