Java – how to increase the loop by 10 instead of 1?

This is my current code: http://ideone.com/PfXNQc

import java.util.Scanner;

public class Temperature
{

    public static double convertFtoC(double F)
    {
        return (F-32)*5/9;
    }

    public static void main(String[] args)
    {
        double F; //Stores Farenheit
        double C; //Stores Celsius

        Scanner keyboard = new Scanner(system.in);

        System.out.print("Enter a temperature in Fahrenheit: "); //Enter in Farenheit
        F = keyboard.nextDouble(); //Stores Farenheit

        System.out.println("The temperature in Celsius is: " + convertFtoC(F)); //Displays Celsius (call convertFtoC(F) where celcuis conversion needed)

        F = 0;

        System.out.println("Fahrenheit\t Celsius"); 
        while (F <= 100)                    
        {
            // Display the F and C in increments of 10.
            System.out.println(F + "\t\t" + convertFtoC(F));
            // Increment for the next day.
            F++;
        }       
    }
}

I want the loop to be converted in increments of 10 instead of 1

Now it outputs this:

But I hope it is

Solution

What if you write the following?

while (F <= 90) //Last number before 100 is 90
{
        // Display the F and C in increments of 10.
        System.out.println(F + "\t\t" + convertFtoC(F));
        // Increment for the next day.
        F=F+10;
}

In addition, why do you use uppercase variables? Traditionally, you should start variable names with lowercase letters and object names with uppercase letters