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  1. Technical
  2. Hooks Functions
  3. Float

float_log

Compute the decimal log of an XFL

Last updated 2 months ago

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Concepts

Behaviour

  • Compute a the decimal logarithm of an XFL number

  • Return the new XFL

❗️Warning

Due to speed constraints,float_log converts the argument to an IEEE base-2 double precision floating point before applying base 10 log. Therefore the returned result will often contain less precision than expected.

  • Calculates the logarithm of a float representation.

  • Returns an error code or the logarithm as a bigint.

Definition

int64_t float_log (
    int64_t float1
);
function float_log(f1: bigint): ErrorCode | bigint

Example

int64_t zero =
    float_log(float_one());

🚧Warning

If a negative number is passed the function will return COMPLEX_NOT_SUPPORTED if the root is an even root.

const zero =
    float_log(float_one())

Parameters

Name
Type
Description

float1

int64_t

An XFL floating point enclosing number representing the floating point number to take the logarithm of

Name
Type
Description

f1

bigint

The float to calculate the logarithm of.

Return Code

Type
Description

int64_t

The computed logarithm If negative, an error: INVALID_FLOAT - the supplied parameter was not a valid XFL enclosing number COMPLEX_NOT_SUPPORTED - the supplied parameter was a negative number which would result in a complex return value.

Type
Description

bigint or ErrorCode

Returns an error code or the logarithm as a bigint.

📐
Floating Point Numbers (XFL)