Problem with powers

It doesnt matter if dream is right about float and double, any whole number ^ 2 should give the right value

x:Float = 4.0 ^ 2.0
Print x

Prints 16

x:Float = 4.0
Y:Float = x^2.0
Print y

Prints 16

x:Float = 4.0
Print x^2.0

Prints 15.999999999998
This is a bug with Print