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log10, log10f
[base 10 logarithms]

SYNOPSIS

    #include <math.h>
    double log10(double x);
    float log10f(float x);

DESCRIPTION

log10 returns the base 10 logarithm of x. It is implemented as log(x)/log(10).

log10f is identical, save that it takes and returns float values.

RETURNS

log10 and log10f return the calculated value. See the description for “log, logf ” for information on errors.

COMPLIANCE

log10 is ANSI C. log10f is an extension.