Assignemnt #97 and 97th program

Code

///Name: Derrick Andreasen
///Period: 7
///Program name: 97th Program
///File name: Ninty7prog.java
///Date Finished:3/16/2016

import java.util.Scanner;

public class Ninty7prog
{
	public static void main( String[] args )
	{
		Scanner keyboard = new Scanner(System.in);
        
        int shape, radius, length, width, side, base, height;
        
        System.out.println( "Shape Area Calculator" );
    do
    {
    System.out.println( "\n_=_=_=_=_=_=_=_=_=_=_=_\n1) Triangle\n2) Rectangle\n3)Square\n4)Circle\n5)Quite\nWhich shape: " );
        shape = keyboard.nextInt();
        
        if(shape==1)
        {
            System.out.print( "Base: " );
            base = keyboard.nextInt();
            System.out.print( "Height: " );
            height = keyboard.nextInt();
            System.out.println( "The area is " + triangle(base, height) );
        }
        else if(shape==2)
        {
            System.out.print( "Length: " );
            length = keyboard.nextInt();
            System.out.print( "Width: " );
            width = keyboard.nextInt();
            System.out.println( "The area is " + rectangle(length, width) );
        }
        else if(shape==3)
        {
            System.out.print( "Side: " );
            side = keyboard.nextInt();
            System.out.println( "The area is " + square(side) );
        }
        else if(shape==4)
        {
            System.out.print( "Radius: " );
            radius = keyboard.nextInt();
            System.out.println( "The area is " + circle(radius) );
        }
        else
            Quit();
        }while (shape != 5);
    }
    public static double triangle(int base, int height)
    {
        double area = base*height/2;
        return area;
    }
    public static int rectangle(int length, int width)
    {
        int area = length*width;
        return area;
    }
    public static int square(int side)
    {
        int area = side*side;
        return area;
    }
    public static double circle(int radius)
    {
        double area = Math.PI*radius*radius;
        return area;
    }
    public static String Quit()
    {
        String quit = "Goodbye";
        return quit;
    }
}
    

Picture of the output