Java Floating Point Numbers - float and double - Java Tutorial - Appficial

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double and float are primitive data types for declaring floating-point numbers. double is more most commonly used because float is not precise. Variables declared as a floating-point can hold fractional values such as -1.25, and 3.1415. Floating point numbers embedded into Java source code are called floating point literals.
You cannot embed dollar signs and comas in a floating point literal.

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