log example in C

Header file:

    math.h

Synopsis:

     double log(double x);

Description:

     Returns the value of natural logarithm of x.

log function C example:

  #include<stdio.h>
  #include<math.h>
  int main() {
        double input, res;
        printf("Enter your input:");
        scanf("%lf", &input);
        res = log(input);
        printf("ln(%lf) = %lf\n", input, res);
        return 0;
  }

  Output:

  jp@jp-VirtualBox:~/cpgms/math$ gcc log.c -lm
  jp@jp-VirtualBox:~/cpgms/math$ ./a.out
  Enter your input:10
  ln(10.000000) = 2.302585