Rate my app : Simple Calculator

[Akar-Slemany]

Here's a simple calculator that i made with java , i am very new java programming.

Here's my code, i hope you like it.

import java.util.Scanner;


public class Main {
	
	private static Scanner input; //define a private Scanner named input

	public static void main ( String args[]){ 
		
		input = new Scanner(System.in);
		 double fnum;//define first number
		 double snum;// define second number;
		 double answer; // define answer
		
		System.out.println("Please enter a number : "); // prompt user to enter first number.
		fnum = input.nextDouble(); // store a number in fnum Scanner Variable
		
		System.out.println("Enter a second number :");//  prompt user to enter second number.
		snum = input.nextDouble(); //store a number in snum Scanner Variable
		
		
		answer = fnum + snum;
		System.out.println("Plus : "+answer);
		answer = fnum - snum;
		System.out.println("Minus : "+answer);
		answer = fnum * snum;
		System.out.println("Multiply : "+answer);
		answer = fnum / snum;
		System.out.println("Divide = " + answer);
		
		
	}

}

[JosAH]

Type 0.0 for the second number and see ... then type utter nonsense for one or both of the numbers and see again ...

kind regards,

Jos

[Akar-Slemany]

Thanks for telling me that

I cleared out that bug

here's new one :

import java.util.Scanner;
 
 
public class Main {
     
    private static Scanner input; //define a private Scanner named input
 
    public static void main ( String args[]){ 
         
        input = new Scanner(System.in);
         double fnum;//define first number
         double snum;// define second number;
         double answer; // define answer
         
        System.out.println("Please enter a number : "); // prompt user to enter first number.
        fnum = input.nextDouble(); // store a number in fnum Scanner Variable
         
        System.out.println("Enter a second number :");//  prompt user to enter second number.
        snum = input.nextDouble(); //store a number in snum Scanner Variable
        if (fnum == 0.0 && snum == 0.0  )
        {
        	System.out.println("Cannot Calculate two zeros");
        }
        
        else {
        	
       
     
         
        answer = fnum + snum;
        System.out.println("Plus : "+answer);
        answer = fnum - snum;
        System.out.println("Minus : "+answer);
        answer = fnum * snum;
        System.out.println("Multiply : "+answer);
        answer = fnum / snum;
        System.out.println("Divide = " + answer);
        }
        
      
         
         
    }
 
}

[JosAH]

But now your calculator can't do, say, 0+0; it should refuse to divide by zero only.

kind regards,

Jos

[CuppaCoffee]

Why did you declare the scanner globally when you're only using it in one place?