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LN

Returns the natural logarithm of a numeric argument.

Syntax

LN ( float_expression )

Arguments

float_expression
Is an expression of type float or of a type that can be implicitly converted to float. Values less than or equal to 0.0 are returned as NULL.

Return Type

Returns values of type FLOAT64.

Examples

Examples in this section use the example blockchain.

This example shows the results of using the LN function.

SELECT LN(real) FROM example;

Response:

LN(real) [FLOAT64]
NULL
NULL
0
0.6931471805599453