log2()

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Applies to: ✅ Microsoft Fabric ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel

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

Syntax

log2(number)

Learn more about syntax conventions.

Parameters

Name	Type	Required	Description
number	real	✔️	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

Run the query

print result=log2(5)

Output

result
2.3219280948873622

Related content

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