Numeric

:: Real a
=> a -> ShowS	a function that can show unsigned values
-> Int	the precedence of the enclosing context
-> a	the value to show
-> ShowS
Converts a possibly-negative `Real` value to a string.

showIntAtBase :: Integral a => a -> (Int -> Char) -> a -> ShowS

Source

Shows a non-negative Integral number using the base specified by the first argument, and the character representation specified by the second.

showInt :: Integral a => a -> ShowS

Source

Show non-negative Integral numbers in base 10.

showHex :: Integral a => a -> ShowS

Source

Show non-negative Integral numbers in base 16.

showOct :: Integral a => a -> ShowS

Source

Show non-negative Integral numbers in base 8.

showEFloat :: RealFloat a => Maybe Int -> a -> ShowS

Source

Show a signed RealFloat value using scientific (exponential) notation (e.g. 2.45e2, 1.5e-3).

In the call showEFloat digs val, if digs is Nothing, the value is shown to full precision; if digs is Just d, then at most d digits after the decimal point are shown.

showFFloat :: RealFloat a => Maybe Int -> a -> ShowS

Source

Show a signed RealFloat value using standard decimal notation (e.g. 245000, 0.0015).

In the call showFFloat digs val, if digs is Nothing, the value is shown to full precision; if digs is Just d, then at most d digits after the decimal point are shown.

showGFloat :: RealFloat a => Maybe Int -> a -> ShowS

Source

Show a signed RealFloat value using standard decimal notation for arguments whose absolute value lies between 0.1 and 9,999,999, and scientific notation otherwise.

In the call showGFloat digs val, if digs is Nothing, the value is shown to full precision; if digs is Just d, then at most d digits after the decimal point are shown.

showFloat :: RealFloat a => a -> ShowS

Source

Show a signed RealFloat value to full precision using standard decimal notation for arguments whose absolute value lies between 0.1 and 9,999,999, and scientific notation otherwise.

floatToDigits :: RealFloat a => Integer -> a -> ([Int], Int)

Source

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

```
n >= 1
```
```
x = 0.d1d2...dn * (base**e)
```
```
0 <= di <= base-1
```

Reading

NB: readInt is the 'dual' of showIntAtBase, and readDec is the `dual' of showInt. The inconsistent naming is a historical accident.

readSigned :: Real a => ReadS a -> ReadS a

Source

Reads a signed Real value, given a reader for an unsigned value.

readInt

Source

:: Num a
=> a	the base
-> Char -> Bool	a predicate distinguishing valid digits in this base
-> Char -> Int	a function converting a valid digit character to an `Int`
-> ReadS a
Reads an unsigned `Integral` value in an arbitrary base.