System.BuiltInLn
Delphi
function BuiltInLn(X: Real): Extended; overload;
function BuiltInLn(X: Real): Double; overload;
function BuiltInLn(X: Real): Single; overload;
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| function | public | System.pas | System | System |
Description
Calculates the natural logarithm of a real expression.
BuiltInLn returns the the natural logarithm ( Ln(e)=1 ) of a real-type expression X.
Compiler Support
The following table shows which Delphi compilers support this function:
| DCC32 | DCC64 | DCCOSX | DCCAARM | DCCIOSARM | DCCIOSARM64 | DCCIOS32 |
|---|---|---|---|---|---|---|
 |
|