Need help ending a loop

[Zeronitic]

I need to end this in Initial miles by entering -1.
Someone told said to use a break statement but I don't know how to use that.
Any ideas on how to end the loop with -1?
Thanks if anyone can help.

import java.util.*;
public class break{
	public static void main(String[] args){
Scanner scan = new Scanner(System.in);
	int gallons;
	int MPG;
	int a;
	int initial = 0;
		
	do
	{
		System.out.print("Initial miles: ");
		initial = scan.nextInt();
			
	System.out.print("Final miles: ");
	int final1 = scan.nextInt();
	
	a = final1-initial;
	
	
	System.out.print("Gallons: ");
	gallons = scan.nextInt();
	
	MPG = a/gallons;

	
	System.out.println("Miles per gallon: " + MPG);
}
	 while ( initial >= 0);
    {
        if (initial < 0)
        {
        System.out.println("bye");
        }
    }
}
}

[Norm]

Where in the loop do you want to exit?
You should find in your textbook or tutorial and read about the break and continue statements. Both are useful in controlling the execution flow in a loop.
break exits,
continues skips to the top.


Your usage of {} are confusing. The {} following the while for example. What are they being used for?

[Zeronitic]

Where in the loop do you want to exit?
You should find in your textbook or tutorial and read about the break and continue statements. Both are useful in controlling the execution flow in a loop.
break exits,
continues skips to the top.


Your usage of {} are confusing. The {} following the while for example. What are they being used for?

The {} are supposed to show "bye" if initial is less than 0.
I'm not too fond of this since I'm in homeschool and I don't have my teacher to give me tips at the moment.

I need it to end it to end when I enter -1 in Initial miles.
-1 is a sentinel value to end the loop but isn't working when I use it.
This is how the program is supposed to start and to end.

Initial miles:

15000

Final miles:

15250

Gallons

10

Miles per Gallon: 25.0



Initial miles:

107000

Final miles:

107450

Gallons

15

Miles per Gallon: 30.0



Initial miles:

-1

bye

[Norm]

Where in the loop, after what statement do you want to exit the loop?
At that point in the loop, add code(an if statement) to test if the user has entered the end the loop value.
If the test is true, use the break statement.


You can remove the {}s that follow the while statement: line 30 & 35. They serve no purpose.

[Zeronitic]

Nevermind. I solved this myself. Thanks for the help.

[Norm]

Glad you got it to work.