As a reply I will just copy a excerpt from the manual:

log EXPR

log

Returns the natural logarithm (base e) of EXPR. If EXPR is omitted, returns the log of $_ .

To get the log of another base, use basic algebra: The base-N log of a number is equal to the natural log of that number divided by the natural log of N. For example:

    sub log10 {
        my $n = shift;
        return log($n)/log(10);
    }

[download]

See also exp for the inverse operation.

In reply to Re: Ln calculation by spandox
in thread Ln calculation by dicty

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