Manpages - log10.3

log10, log10f, log10l - base-10 logarithmic function

  #include <math.h>

  double log10(double x);
  float log10f(float x);
  long double log10l(long double x);

Link with -lm.

Feature Test Macro Requirements for glibc (see *feature_test_macros*(7)):

*log10f*(), *log10l*():

      _ISOC99_SOURCE || _POSIX_C_SOURCE >= 200112L
          || /* Since glibc 2.19: */ _DEFAULT_SOURCE
          || /* Glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE

These functions return the base 10 logarithm of x.

On success, these functions return the base 10 logarithm of x.

For special cases, including where x is 0, 1, negative, infinity, or NaN, see *log*(3).

See *math_error*(7) for information on how to determine whether an error has occurred when calling these functions.

For a discussion of the errors that can occur for these functions, see *log*(3).

For an explanation of the terms used in this section, see *attributes*(7).

C99, POSIX.1-2001, POSIX.1-2008.

The variant returning double also conforms to SVr4, 4.3BSD, C89.

*cbrt*(3), *clog10*(3), *exp10*(3), *log*(3), *log2*(3), *sqrt*(3)

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