# math/log2 Base-2 logarithm of `x`. ## Syntax

[math/log2 $x]

## Parameters - `$x` — Positive number ## Examples

[math/log2 1]    # 0
[math/log2 2]    # 1
[math/log2 8]    # 3

## Returns Number — base-2 logarithm of `$x`. ## See Also `math/log10`, `math/ln`, `math/exp`