how to use math.pi in java

Question

I am having problems converting this formula V = 4/3 π r^3. I used Math.PI and Math.pow, but I get this error:

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Answer 1

Your diameter variable won't work because you're trying to store a String into a variable that will only accept a double. In order for it to work you will need to parse it

Ex:

diameter = Double.parseDouble(JOptionPane.showInputDialog("enter the diameter of a sphere.");