Encyclopedia > NaN

  Article Content


In computing, Not a Number is a result typically indicating out-of-bounds input or output in floating point calculations. For example, a typical Floating Point Unit is not designed to be able to calculate the square root of negative numbers, and will instead return a NaN result.

In floating point calculations, NaN is not the same as zero or infinity, although all three are typically handled as special cases in floating point representations of real numbers. It is also not the same as an overflow or underflow error.

See also: IEEE Floating Point Standard

All Wikipedia text is available under the terms of the GNU Free Documentation License

  Search Encyclopedia

Search over one million articles, find something about almost anything!
  Featured Article
Grundy Center, Iowa

... the city. The population density is 409.1/km² (1,058.9/mi²). There are 1,176 housing units at an average density of 185.3/km² (479.7/mi²). The racial ...