#include <cmath>float log(float num);double log(double num); long double log(long double num); 

The log( ) function returns the natural logarithm for num. A domain error occurs if num is negative, and a range error occurs if the argument is zero.

A related function is log10( ).

C(s)C++ Programmer's Reference
C Programming on the IBM PC (C Programmers Reference Guide Series)
ISBN: 0673462897
EAN: 2147483647
Year: 2002
Pages: 539

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