log2()

Learn how to use the log2() function to return the base-2 logarithm of the input.

The logarithm is the base-2 logarithm: the inverse of the exponential function (exp) with base 2.

Syntax

log2(number)

Parameters

NameTypeRequiredDescription
numberreal✔️The number for which to calculate the base-2 logarithm.

Returns

  • The logarithm is the base-2 logarithm: the inverse of the exponential function (exp) with base 2.
  • null if the argument is negative or null or can’t be converted to a real value.

Example

print result=log2(5)

Output

result
2.3219280948873622

Related content

  • For natural (base-e) logarithms, see log().
  • For common (base-10) logarithms, see log10().