log2

Type

function

Summary

Returns the base-2 logarithm of a number.

Syntax

the log2 of <number>

log2(<number>)

Description

Use the log2 function to obtain a base-2 logarithm.

The base-2 logarithm of a number is the power to which 2 must be raised to obtain the number : 2^log2(number) is equal to number.

If a math operation on finite inputs produces a non-finite output, an execution error is thrown. See math operations for more information.

Parameters

Name	Type	Description
number		A positive number, or an expression that evaluates to a positive number.

Examples

log2(8) -- returns 3

log2(0.125) -- returns -3

Related

control structure: function

function: ln1

glossary: return, math operation

Compatibility and Support

Introduced

LiveCode 1.0

OS

mac

windows

linux

ios

android

Platforms

desktop

server

mobile