Exponential and Logarithmic Functions

exp(z) Returns the number e raised to the power z.

log(z, [b]) Returns the base b logarithm of z. If b is omitted, returns base 10 log of z.

ln(z) Returns the natural logarithm (base e) of z.

ln0(z) Returns the natural logarithm (base e) of z, but returns −1 × 10307 at z = 0. Using ln0 is useful inside optimzation routines, where the value of the argument can't be bounded to avoid the asymptote.

Arguments:

Notes:

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