ln

#ln

##Syntax ln ( r : real ) : real

##Description The ln function is used to find the natural logarithm (base e) of a number. For example, ln ( 1) is 0.

##Example This program prints out the logarithms of 1, 2, 3, � up to 100.

    for i : 1 .. 100
        put "Logarithm of ", i, " is ", ln ( i )
    end for

##Details See also the exp (exponential) function. You cannot take the logarithm of zero or a negative number.

##Note logn (i ) = ln (i ) / ln (n )

##See also exp.html (the exponentiation function).

See also predefined unit mathmodule.html.