nValueNumericRequired
Positive value in this subset.
FUNCTIONUnder review
Log
Log(nValue) -> nResultCalculates the natural logarithm, base e.
Overview
Takes a numeric value. For finite real results this example requires strictly positive input. Absence of runtime errors is not mathematical-domain or precision validation. (Sources: refs. 1–1.)
Syntax
Log(nValue) -> nResultParameters
Return value
Numeric logarithm result.
Commented example
#Include "Protheus.ch"
User Function Ed509()
Local nValue := 1
// Validate the domain before calling.
If nValue > 0
ConOut(cValToChar(Log(nValue)))
EndIf
Return NilExpected result
Result: 0. Under review: editorial example neither compiled nor run in Protheus. Check includes, release, RDD and context before testing.
- Define numerical tolerance and handle invalid inputs in the caller.
- Under review: editorial example neither compiled nor run in Protheus. Check includes, release, RDD and context before testing.
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