LN _ _ _ _ _ _ _ _ _ _ _ _ operator

syntax:

<expression> can be any valid scalar REDUCE expression.

The ln operator returns the natural logarithm of its argument. However, unlike log, there are no algebraic rules associated with it; it will only evaluate when rounded is on, and the argument is a real number.

examples:

ln(x); 

  LN(X) 


ln 4; 

  LN(4) 


ln(e); 

  LN(E) 


df(ln(x),x); 

  DF(LN(X),X) 


on rounded; 

ln 4; 

  1.38629436112 


ln e; 

  1

Because of the restricted algebraic properties of ln, use rs are advised to use log whenever possible.