Linux cli command HUGE_VALL

➡ A Linux man page (short for manual page) is a form of software documentation found on Linux and Unix-like operating systems. This man-page explains the command HUGE_VALL and provides detailed information about the command HUGE_VALL, system calls, library functions, and other aspects of the system, including usage, options, and examples of _. You can access this man page by typing man followed by the HUGE_VALL.

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NAME 🖥️ HUGE_VALL 🖥️

floating-point constants

LIBRARY

Math library (libm)

SYNOPSIS

#define _ISOC99_SOURCE /* See feature_test_macros(7) */
#include <math.h>
INFINITY
NAN
HUGE_VAL
HUGE_VALF
HUGE_VALL

DESCRIPTION

The macro INFINITY expands to a float constant representing positive infinity.

The macro NAN expands to a float constant representing a quiet NaN (when supported). A quiet NaN is a NaN (“not-a-number”) that does not raise exceptions when it is used in arithmetic. The opposite is a signaling NaN. See IEC 60559:1989.

The macros HUGE_VAL, HUGE_VALF, HUGE_VALL expand to constants of types double, float, and long double, respectively, that represent a large positive value, possibly positive infinity.

STANDARDS

C11.

HISTORY

C99.

On a glibc system, the macro HUGE_VAL is always available. Availability of the NAN macro can be tested using #ifdef NAN, and similarly for INFINITY, HUGE_VALF, HUGE_VALL. They will be defined by <math.h> if _ISOC99_SOURCE or _GNU_SOURCE is defined, or __STDC_VERSION__ is defined and has a value not less than 199901L.

SEE ALSO

fpclassify(3), math_error(7)

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