# Number

(Redirected from NaN)

The number type is inhabited by real numeric values.^{[1]} Specifically, it has 53 bits of precision,^{[2]} meaning it can accurately represent integral values in the interval , outside of which arithmetic operations will gradually lose precision. This is because the number type is implemented using double-precision floating-point numbers.

## Contents

## Non-numeric values

### NaN

**NaN**, which stands for **not a number**, is a special value of the number type. In Lua, it is the only value that is not equal to itself.^{[3]}

### inf

**inf**, which stands for **infinity**, is the largest number Lua can represent. It can be obtained by the use of math.huge or `1/0`

.

## References

- ↑ Ierusalimschy, Roberto (March 2006).
*Programming in Lua*. p. 29. ISBN 8590379825. - ↑ "IEEE Standard for Floating-Point Arithmetic".
*IEEE Std 754-2008*: 1–70. August 2008. doi:10.1109/IEEESTD.2008.4610935. - ↑ "Inf And Nan Comparisons".
*lua-users*. 2006-09-30. Retrieved 2018-08-05.