Function log from math.h returns wrong

Question

I was getting wrong values from log(), so I wrote this program just for testing:

#include <math.h>
#include <stdio.h>
void main()
{
  printf ("%1f", log(10));
}

This should print "1", but I get "2.302585"

Why is this and how can I fix it?

`log` is the natural logarithm. You want `log10`. – Christian Gibbons Sep 19 '18 at 21:51 — Christian Gibbons, Sep 19 '18 at 21:51

score 6 · Accepted Answer · answered Sep 19 '18 at 21:52

6

The log function is for the natural logarithm with base e.

It seems you want log10 instead.

answered Sep 19 '18 at 21:52

1 Answers1