Assignemnt #97 Area Calculator

Code

    ///Name: Prooz Fereydouni
    ///Period: 7
    ///Project Name: Area Calculator
    ///File Name: AC.java
    ///Date: 3/31/2016
  
import java.util.Scanner;
public class AC
{
    public static void main( String[] args )
    {   
        int answer=0;
        while(answer!=5)
        {
            Scanner kb = new Scanner(System.in);
            System.out.println("Which shape do you want to find the area of? Input the corresponding number.");
            System.out.println("1) Triangle");
            System.out.println("2) Rectangle");
            System.out.println("3) Square");
            System.out.println("4) Circle");
            System.out.println("5) Quit)");
            answer = kb.nextInt();
            if(answer==1)
            {
                System.out.println("Base of the triangle: ");
                int a= kb.nextInt();
                System.out.println("Height of the triangle: ");
                int b= kb.nextInt();
                int area1 = areaTriangle(a,b);
                System.out.println("The area of the triangle is " + area1);
            }
            else if(answer==2)
            {
                System.out.println("Length of the rectangle: ");
                int c= kb.nextInt();
                System.out.println("Width of the rectangle: ");
                int d= kb.nextInt();
                int area2 = areaRectangle(c,d);
                System.out.println("The area of the triangle is " + area2);
            }
            else if(answer==3)
            {
                System.out.println("Side of the square: ");
                int e= kb.nextInt();
                int area3 = areaSquare(e);
                System.out.println("The area of the triangle is " + area3);
            }
            else if(answer==4)
            {
                System.out.println("Radius of the circle: ");
                int f= kb.nextInt();
                double area4 = areaCircle(f);
                System.out.println("The area of the triangle is " + area4);
            }
            else if(answer!=1 && answer!=2 && answer!=3 && answer!=4 && answer!=5)
            {
                System.out.println("WRONG INPUT!");
                answer = kb.nextInt();
            }
        }
    }
    public static double areaCircle( int radius )
    {
        double area = radius * radius * Math.PI;
        return area;
    }
    public static int areaRectangle( int length, int width )
    {
        int area = length * width;
        return area;
    }
    public static int areaSquare( int side )
    {
        int area = side * side;
        return area;
    }
    public static int areaTriangle( int base, int height )
    {
        int area = base * height / 2;
        return area;
    }
}




    

Picture of the output