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X-Hacker.org- Watcom C Library Reference - <u>synopsis:</u>
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Synopsis:
#include <math.h>
double log10( double x );
Description:
The log10 function computes the logarithm (base 10) of x. A domain
error occurs if the argument is negative. A range error occurs if the
argument is zero.
Returns:
The log10 function returns the logarithm (base 10) of the argument.
When the argument is outside the permissible range, the matherr
function is called. Unless the default matherr function is replaced,
it will set the global variable errno to EDOM, and print a "DOMAIN
error" diagnostic message using the stderr stream.
Example:
#include <stdio.h>
#include <math.h>
void main()
{
printf( "%f\n", log10(.5) );
}
produces the following:
-0.301030
Classification:
ANSI
Systems:
Math
See Also:
exp, log, log2, pow, matherr
See Also: exp log
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