Why is my while loop not looping?

a

Why use a double for the loop control variable?

Can you copy the contents of the console window that shows the problem and paste it here?

To copy the contents of the command prompt window:
Click on Icon in upper left corner
Select Edit
Select 'Select All' - The selection will show
Click in upper left again
Select Edit and click 'Copy'

Paste here.

Please edit your post and wrap your code with
[code=java]
<YOUR CODE HERE>
[/code]
to get highlighting and preserve formatting.

a

That's the Scanner leaving a linenend character in its buffer after the call to nextDouble().
Call nextLine() to clear the lineend character after the call to nextDouble().

It still output the same error after I changed my loop control variable to int

See my edited last post.

Sorry, I read it but it is not very clear to me.

--- Update ---

Thank you very much. I figured it out, so sorry for any inconvenience.