gistfile1.java

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package homework;

import java.util.Scanner;

/**
 *
 * @author Marwa
 */
public class Homework {
    private static Object Kbinput;

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
                Scanner s=new Scanner(System.in);
                System.out.println("YOU HAVE FOLLOWING CHOICES : ");
		System.out.println("1. ADDITION");
		System.out.println("2. SUBTRACTION ");
		System.out.println("3. MULTIPLICATION ");
		System.out.println("4. DIVISION");
		System.out.println("ENTER YOUR CHOICE : ");
		int i=s.nextInt();
		  
		System.out.println("ENTER FIRST NUMBER ");
		int a=s.nextInt();
		  
		System.out.println("ENTER SECOND NUMBER ");
		int b=s.nextInt();
		  
                if ( a > 5 )    
                if ( a < 1 ) 
                if (  b < 5 ) 
                if ( b < 1) {
                    System.out.println( "INVALID CHOICE" ) ;
                }                
                
		double result=0;
		  
		switch(i)
		{
			case 1:
				result=a+b;
				break;
			case 2:
				result=a-b;
				break;
			case 3:
				result=a*b;
				break;
			case 4:
				if(b==0)//when denominator becomes zero
				{
					System.out.println("DIVISION NOT POSSIBLE");
					break;
				}
				else
					result=a/b;
		   
			default:
				System.out.println("YOU HAVE ENTERED A WRONG CHOICE");
		   
		}
		  
		System.out.println("RESULT = "+result);
	
          
    }
    
}