Ln Function

Name

Ln Function

function Ln(X: Floating-point type): Extended;

Ln returns the natural logarithm of X. The Ln function is built-in.

Delphi automatically converts Integer and Variant arguments to floating point. To convert an Int64 argument to floating point, add 0.0.
If X is a signaling NaN or negative (including negative infinity), Delphi reports runtime error 6 (EInvalidOp).
If X is zero, Delphi reports runtime error 7 (EZeroDivide).
If X is positive infinity, the result is positive infinity.
If X is a quiet NaN, the result is X.