01 #include <math.h>

02 #include <stdio.h>

03

04 int main()

05 {

06 double result;

07 double x = 8.6872;

08

09 result = log(x);

10 printf("The natural log of %lf is %lfn", x, result);

11

12 return 0;

13 }

OUTPUT :

The natural log of 8.687200 is 2.161851