Floating-point numbers are like real numbers in mathematics, for example, 3.14159, -0.000001.
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Floating-point numbers are like real numbers in mathematics, for example, 3.14159, -0.000001. Java has two kinds of floating-point numbers: float and double, both stored in IEEE-754 format. The default type when you write a floating-point literal is double.
Limited precision
Because there are only a limited number of bits in each floating-point type, some numbers are inexact, just as the decimal system can not represent some numbers exactly, for example 1/3. The most troublesome of these is that 1/10 can not be represented exactly in binary.
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