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floating-point number

A number with a fractional part, stored approximately.

f32 and f64 are IEEE 754 binary floating-point types; many decimal fractions (0.1) are stored approximately.

Examples

  • 0.1 + 0.2 prints 0.30000000000000004, so 0.1 + 0.2 == 0.3 is false; compare with (sum - 0.3).abs() < 1e-9 instead.

See also

integer type cast type
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