Assignment 97; ShapeCalc

Code

    // Donovan Rich
    // Period 6
    // Area Calculator
    // ShapeCalc.java
    // 3/28/2016
    
    import java.util.Scanner;
    
    public class ShapeCalc
    {
        public static void main( String[] args )
        {
            Scanner keyboard = new Scanner(System.in);
            int choice;
            double s1, s2;
            System.out.println();
            System.out.println( "\nShapeCal BETA BUILD v2.13" );
            System.out.println();
            do
            {
                System.out.println();
                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" );
                System.out.print( "Desired shape: " );
                choice = keyboard.nextInt();
    
                if ( choice == 1 )
                {
                    System.out.println();
                    System.out.print( "Base: " );
                    s1 = keyboard.nextDouble();
                    System.out.print( "\nHeight: " );
                    s2 = keyboard.nextDouble();
                    System.out.println( "The area is " + calcTriangle( s1, s2 ) );
                }
                else if ( choice == 2 )
                {
                    System.out.println();
                    System.out.print( "Length: " );
                    s1 = keyboard.nextDouble();
                    System.out.print( "\nWidth: " );
                    s2 = keyboard.nextDouble();
                    System.out.println( "The area is " + calcRectangle( s1, s2 ) );
                }
                else if ( choice == 3 )
                {
                    System.out.println();
                    System.out.print( "Side: " );
                    s1 = keyboard.nextDouble();
                    System.out.println( "The area is " + calcSquare( s1 ) );
                }
                else if ( choice == 4 )
                {
                    System.out.println();
                    System.out.print( "Radius: " );
                    s1 = keyboard.nextDouble();
                    System.out.println( "The area is " + calcCircle( s1 ) );
                }
                else if ( choice == 5 )
                {
                    System.out.println();
                    System.out.print( "Thank you for using ShapeCal BETA BUILD v2.13!\n" );
                }
                else
                {
                    System.out.println();
                    System.out.print( "Unrecognized shape number. Please retry input." );
                }
            } while ( choice != 5 );
        }
        
        public static double calcTriangle( double s1, double s2 )
        {
            double result;
            result = (s1*s2)/2;
            return result;
        }
        public static double calcRectangle( double s1, double s2 )
        {
            double result;
            result = (s1*s2);
            return result;
        }
        public static double calcSquare( double s1 )
        {
            double result;
            result = (s1*s1);
            return result;
        }
        public static double calcCircle( double s1 )
        {
            double result;
            result = (s1*s1)*Math.PI;
            return result;
        }
    }
                    
            
            
        

Picture of the output