Thread: help with if and else if program

hello, i am trying to write a program that asks the user to enter a number from 1 through 10 and then the program will display the roman numeral for that number.
i am also adding a error message in which i haven't yet because im still trying to figure out how to the program will do the roman numeral.'
i have used the if and else if. but when i input a number it just repeats the number back to me.

the program cimpiles but it doesn't do what i want. here is what i have so far. how can i get the program to display the roman numeral after the number is entered.

import javax.swing.JOptionPane;
 
public class Romannumeral
{
	public static void main(String[] args)
	{
	double number;
 
	String input;
 
 
 
	number = Double.parseDouble(JOptionPane.showInputDialog("Enter a 
 
number within the range of 1 through 10."));
 
 
 
	if (number == 1)
	{
          System.out.println("I");
	} 
 
	else if (number == 2)
	{
            System.out.println("II");
	} 
 
	else if (number == 3)
	{  
          System.out.println("III");
	} 
 
	else if (number == 4) 
	{
          System.out.println("IV");
	}
 
	else if ( number == 5 )
	{
           System.out.println("V");
	}
 
	else if (number == 6)
	{
	   System.out.println("VI");
	}
 
	else if (number == 7)
	{    
	   System.out.println("VIII");
	}
 
	else if (number == 8)
	{
	    System.out.println("VIIII");
	}
 
	else if (number == 9)
	{
 	   System.out.println("IX");
	}
 
	else if (number == 10)
	{
	  System.out.println("X");
	}
 
	JOptionPane.showMessageDialog(null, "Roman numeral: + input " );
 
	}
}

aw you make sense. i totally forgot about that. i will change it and see if it works. also on the joptioon dialog box where i put +imput is that correct or should i put + number after i change the system.out

so what your saying is that i shouldn't call number a double. i finished the program and it works. at the end i added an error message.

 
	else if (number == 10)
	{
	   JOptionPane.showMessageDialog(null, "Roman numeral: X");
	}
	else 
	{
	    JOptionPane.showMessageDialog(null, "Invalid Number");
	}
 
	System.exit(0);
 
 
	}
 
}

like this. when i enter a number beside 1 - 10 it says invalid number. but what did u say about the double . i don't really understand. (beginner) lol

i understand.
i tried doing it with an int but when i tried to compile it didn't work. it said that on this part it didn't recognize (of). so i put in the double and it worked.

 
number = Double.parseDouble(JOptionPane.showInputDialog("Enter a number within the range of 1 through 10."));

it said it didn't recognize the of after the word range

ok i change it and it work you where right, i probably did it wrong or misspelled something the first time