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I keep getting CircleInformation.java:13: error: cannot find symbol float circumference = 2 (PI radiusF)
^Screen_Shot_2020-04-20_at_2_19_38_PM.png

Edited by may5457
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  • Latest Post Latest Post by JamesCherrill
Member Avatar for JamesCherrill

radiusF has to be a variable fro this program, but PI is probably the obvious constant from the java.util.Math class. You can only make an unqualified reference to it like that if you have imported it at the beginning of the source file.

Edited by JamesCherrill
commented: how do i make radiusf a variable? its suppose to be radius but the f is because its has to be a float +0
Member Avatar for may5457

I have everything defined already
double PI = 3.14159;
float radius = 3.85f;
float circumference = 2 PI radiusf;

commented: radius and radiusf. Think this over. +15
Member Avatar for JamesCherrill

Maybe this is where you are misunderstanding something... (?)
When you define a float constant you need an f, eg 123f, 3.14159fetc so the compiler knows you want a float and not a double.
But when you use a float variable you never add an f to its name - declaring it as float was enough for the compiler to know what to do.
so:
float x = 123f; System.out.println(x); NOT System.out.println(xf);

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