& ln() Syntax: ln(<number>) Returns the result of taking the natural logarithm (base e) of <number>. <number> may be a floating point number, and a floating point result is returned. Example: > say ln(0) You say "#-1 LN OF NEGATIVE OR ZERO" > say ln(1) You say "0" > say ln(e()) You say "1" > say ln(10) You say "2.302585" See Also: e(), exp(), log(), power()