Float package:ghc-internal

Single-precision floating point numbers. It is desirable that this type be at least equal in range and precision to the IEEE single-precision type.

The types Float and Double, the classes Floating and RealFloat and casting between Word32 and Float and Word64 and Double.

a 32-bit floating point number

Trigonometric and hyperbolic functions and related functions. The Haskell Report defines no laws for Floating. However, (+), (*) and exp are customarily expected to define an exponential field and have the following properties:

• exp (a + b) = exp a * exp b
• exp (fromInteger 0) = fromInteger 1

1.23#

Truncates a Float# value to the nearest Int#. Results are undefined if the truncation if truncation yields a value outside the range of Int#.

a constant function, returning the number of digits of floatRadix in the significand

a constant function, returning the radix of the representation (often 2)

a constant function, returning the lowest and highest values the exponent may assume

floatToDigits takes a base and a non-negative RealFloat number, and returns a list of digits and an exponent. In particular, if x>=0, and

floatToDigits base x = ([d1,d2,...,dn], e)

then

1. n >= 1

2. x = 0.d1d2...dn * (base**e)

3. 0 <= di <= base-1