method
log10
v2_4_6 -
Show latest stable
- Class:
Math
log10(p1)public
Returns the base 10 logarithm of x.
Domain: (0, INFINITY)
Codomain: (-INFINITY, INFINITY)
Math.log10(1) #=> 0.0 Math.log10(10) #=> 1.0 Math.log10(10**100) #=> 100.0
1Note
Any base logarithm
Using basic arithmetic you can get logarithm with any base:
def log_with_base base, num
Math.log(num) / Math.log(base)
end
Examples:
>> log_with_base 2, 10
=> 3.32192809488736
>> log_with_base 2, 2
=> 1.0
>> log_with_base 2, 4
=> 2.0
>> log_with_base 2, 16
=> 4.0
>> log_with_base 4, 16
=> 2.0
