"valid declarations of a float" required

[PETER CARTER]

Which three are valid declarations of a float? (Choose Three)
A. Float foo = -1;
B. Float foo = 1.0;
C. Float foo = 42e1;
D. Float foo = 2.02f;
E. Float foo = 3.03d;
F. Float foo = 0x0123;
Answer: A, D, F
I think only D is right.
Do u follow me ??

[Doyle Matt]

If you make the "Float" words into "float" then its ok, but regarding your answer. All numbers that has a "." thingy on them or a decimal value (i think that is what is called) are initially considered as a double value.
For example declaring 1.2 means that you have a double 1.2 value.
With regards w/ the "-1" value. It means the you have an int value. Since it is implicitly castable to a float, or a float can hold an int value that statement is correct.

Remember the transition of numerical data types are as follows

byte -> short -> int -> long -> float -> double.

any backward assignment needs an explicit cast.
[ September 22, 2004: Message edited by: Doyle Matt ]

[Dirk Schreckmann]

Peter, you might like to take a look at section 3.10 Literals of the JLS.