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type > primitive type > floating point type > double^2

double^2
subject			fact

double^2	can hold a value between 4.9E-324 and 1.7E308
	contains 64 bits
	has default value +0.0
	is a subtopic of Variables and Data Types
	is an instance of floating point type
floating point type	has a sign indicating positive or negative
primitive type	evaluates to the value stored in the variable
	has part primitive type name
	is not an object
	is normally used instead of wrapper class instances for arithmetic
type	limits the possible values that a variable can hold or that an expression can produce at run time
	specifies a set of value