LN
LOG10
LOG2

Syntax: LN (x)
   and: LOG10(x)
   and: LOG2(x)
Location: QL ROM (LN and LOG10)
          Math Package (LOG2)

These functions all return logarithms in various bases.

LN returns the natural logarithm of the given value (in base e).

LOG10 returns the common logarithm (in base 10)

LOG2 returns the logarithm in base 2.

CROSS-REFERENCE:
EXP converts natural logarithms to their true numbers in base 10.
