Revision as of 23:52, 20 September 2009

Ln(x)

The natural logarithm of «x». This is the value y such that e^y=Exp(y)=x, where e2.718281828459045 is Euler's number.

«x» must be non-negative or a warning will be issued. If the warning is ignored, or Show Result Warnings is off, the result is NaN.

Math functions

Ln(1) → 0

Ln(2) → 0.6931471805599453

Ln(2.718) → 0.999896315728952

Ln(0) &rarr -Inf

Ln(-1) &rarr NaN { With Warning: Logarithm of a non-positive number }

@@ Line 2: / Line 2: @@
 [[Category:Doc Status D]] <!-- For Lumina use, do not change -->
-{{stub}}
+= Ln(x) =
+The natural logarithm of «x».  This is the value ''y'' such that ''e<sup>y</sup>=[[Exp]](y)=x'', where ''e2.718281828459045'' is Euler's number.
+«x» must be non-negative or a warning will be issued.  If the warning is ignored, or [[Preferences|Show Result Warnings]] is off, the result is [[NaN]].
+= Library =
+Math functions
+= Examples =
+:Ln(1) &rarr; 0
+:Ln(2) &rarr; 0.6931471805599453
+:Ln(2.718) &rarr; 0.999896315728952
+:Ln(0) &rarr -[[Inf]]
+:Ln(-1) &rarr [[NaN]]   { With Warning: Logarithm of a non-positive number }
+= See Also =
+* [[LogTen]](x)
+* [[Exp]](x)
+<comments />