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C COMPILER LIBRARY FUNCTION REFERENCE->Detailed Descriptions->log() logl()

Summary

#include <math.h>

    

double log(double x)	Calculate natural logarithm to double precision
long double logl(long double x)	Calculate natural logarithm to long double precision

Parameter
    

x	Floating point value

Description

These functions calculate the natural logarithm of x.  The result is undefined if x is less than zero.


Return

These functions return the natural logarithm of the parameter passed.