Java Online Compiler
Example: How to Find Area of a Circle with Diameter in Java using Math.PI
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Main.java
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// How to Find Area of a Circle with Diameter in Java using Math.PI import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.println("Enter the radius of the circle::\n"); float r = in.nextFloat(); float d; float c; float a; // r = radius, d = diameter, c = circumference, a = area // It will calculate the diameter, circumference, and area d = 2 * r; c = (float)(2 * Math.PI * r); a = (float)(Math.PI * Math.pow(r, 2)); System.out.println("\nDiameter = " + d + " units"); System.out.println("Circumference = " + c + " units"); System.out.println("Area = " + a + " sq. units"); } }
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