Returns the result of taking the common logarithm (base 10) of number. number may be a floating point number, and a floating point result is returned.
- > say log(0)
- You say "-Inf"
- > say log(1)
- You say "0"
- > say log(10)
- You say "1"
- > say log(e())
- You say "0.434294"
(--Soylent 01:39, 3 December 2005 (EST))
It's not really a trick, but a well known math formula. Namely, the change of base formula:
log X log_b X = ------- log b
Or more generally:
log_c X log_b X = --------- log_c B
where c is a new sane value.
For example, if I wanted to know how many bits a certain value will take:
PennMUSH's log() takes an optional second argument that is used as the base. Internally, it uses the above formula.