#include <cmath> double log10( double num );
The log10() function returns the base 10 (or common) logarithm for num. There's a domain error if num is negative, a range error if num is zero.
C++ also provides the following overloaded forms:
#include <cmath> float log10( float num ); // same as log10f() in C99 long double log10( long double num ); // same as log10l() in C99
Related Topics: log