Thread: [Easy] Finding area of triangle, rectangle, and circle.

User inputs information to find the area of one of the three shapes. It works fine, but I need it to round to the second decimal. For example when you enter 2.5 for the radius of the circle, it outputs "Area of the circle is 19", rather than what I want it to, "Area of the circle is 19.63". Here is all of the code first:

package areas;
 
import java.util.Scanner;
 
public class triangle_rectangle_circle {
 
	public static void main(String[] args) {
 
		System.out.println("This program was written by Dan");
		System.out.println("-----------------------------");
 
		String varName;
        System.out.print("Enter your name: ");
        Scanner stringScanner = new Scanner(System.in); //string scanner
        varName = stringScanner.nextLine(); 
 
		String transChar;
		System.out.print("Please select a shape: (R)ectangle, (T)riangle, or (C)ircle: ");
		transChar = stringScanner.nextLine(); //transChar = transition to char
		char caseSelector = transChar.charAt(0);
		System.out.println("-----------------------------");
 
		Scanner numScanner = new Scanner(System.in); //number scanner
 
		switch (caseSelector){
 
			//Case: Rectangle
 
			case 'r':
			case 'R':
 
				double rLength;
				double rWidth;
 
				System.out.print("Please enter width: ");
				rLength = numScanner.nextDouble();
				System.out.println("Please enter height: ");
				rWidth = numScanner.nextDouble();
				double rArea = (rLength * rWidth);
				System.out.print("Area of the rectangle is " + Math.round(rArea * 100 / 100));
				System.out.println();
				break;
 
 
			//Case: Triangle
 
			case 't':
			case 'T':
 
				double tBase;
				double tHeight;
 
				System.out.println("Please enter base:");
				tBase = numScanner.nextDouble();
				System.out.println("Please enter height: ");
				tHeight = numScanner.nextDouble();
				double tArea = (.5 * tBase * tHeight);
				System.out.println("Area of the triangle is " + Math.round(tArea * 100) / 100);
				System.out.println();
				break;
 
 
			//Case: Circle
 
			case 'c':
			case 'C':
 
				double cRadius;
 
				System.out.println("Please enter radius: ");
				cRadius = numScanner.nextDouble();
				double cArea = (Math.pow (cRadius,2) * Math.PI);
				System.out.println("Area of the circle is " + Math.round(cArea * 100) / 100);
				System.out.println();
				break;
 
			default:
 
				System.out.println("Please restart the program and enter a valid option");
				break;
 
		} //switch (caseSelector)
 
		System.out.println("-----------------------------");
		System.out.println("This program was run by: " + varName);
		stringScanner.close();
		numScanner.close();
 
	} //main method
 
} //public class triangle_rectangle_circle

This is the part where I believe I'm going wrong:

case 'c':
			case 'C':
 
				double cRadius;
 
				System.out.println("Please enter radius: ");
				cRadius = numScanner.nextDouble();
				double cArea = (Math.pow (cRadius,2) * Math.PI);
				System.out.println("Area of the circle is " + Math.round(cArea * 100) / 100);
				System.out.println();
				break;

double cArea = (Math.pow (cRadius,2) * Math.PI);

calculates the area

System.out.println("Area of the circle is " + Math.round(cArea * 100) / 100);

is supposed to round the area to the second decimal by using

 Math.round(cArea * 100) / 100);

I'm not sure where I'm going wrong, I just need the 2 decimal places to be there when I enter a decimal, and it's not a integer. Ty!